Duct filter frame

Duct filter frame. This system removes the need to dispose of the whole filter when just the filter pad needs to be disposed of. EZ-FLO Magnetic Frame - G: R-1M : R-2M: Polypropylene Electrostatic Filter Media Layers: Single : Dual : Galvanized Steel Frame: 1/4" 5/16" Magnetic Filter Frame Border 1/2" Wire Reinforcement Grid over 650 Sq Inches: Washable UV Protected Media: 5 Year Warranty Filter / 2 Year Magnetic Frame: Click to view SPECIFICATION DATA SHEET Rinse the filter lightly with soapy water, then rinse with clear water until clean. 75" Width X 13. It seems like the metal flaps that hold the filter in place are a little too large for my current To properly insert a new air filter, look for the arrow! Questions? Contact us online or call (855) 237-1673. FREE Returns . It worked the way I needed it to HS-Luftfilterbau GmbH offers a wide product range of air filters and air filtration solutions. Size – 8"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 10 5/8" width X 10 5/8" height -; High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Installation Location – Ceiling; Design – Fixed hinged for easy filter change & Synthetic Panel Air Filters are a low to medium efficiency air filter for the filtration of large particulates to an efficiency up to G4 to EN779:2012. Accord Ventilation products are sure to enhance any home decor. List: $159. Simple insertion of the filters into a standard cell frame with 4 spring clips; Quick installation without additional attachments; Casing is supplied fully assembled; from size 3. Warranty / Certifications This filter frame is used with 1" filters (filters sold separately). This grill uses a 1" thick filter (not included). filter; Filter not included; Return Policy; Product Information. 24/7 Customer Care. The frames hold a pad of filter media i. $50. ) 9. What are some of the most reviewed products in 12x30 Air Filters? Some of the most reviewed products in 12x30 Air Filters are the Rheem 12 x 30 x 1 Basic Household Pleated MERV 8 - FPR 4 Air Filter (12-pack) with 9,742 reviews, and the HDX 12 in. 1-800-645-7270; Live Chat; Help Center; About Us; Give Feedback; Sign In; Cart; Menu. ) 25 in. Learn how to change a home air filter in an air duct or window unit. final pressure drop 2. Warranty / Certifications. C-Air offers a full range of grease filters designed specifically for the These air filter assemblies include a housing, transition(s) to a duct system, and air filter elements. If you use flex duct, put a filter at the return air intake in the bathroom. yswekls Steel Return Air Filter Grille for Sidewall and Ceiling [Duct Opening Size] Vent Cover Return Air for 1-inch Filters | Vent Cover Grill, White (Duct Opening Sizez:20inch x 30inch) dummy HVAC Premium 14" X 24" Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". Easy filter access with use of snap clips and simplified "door". Visit our MEGASTORE ducting-express. Carbon Filter. Housings are available for duct mounted systems, front withdrawal within air handling units Air filter pad holding frames provide support for air filter pads and help keep them in place in HVAC systems. In Stock. 52. 3. The actual size is written in small numbers like 15. L; Filter lock has built-in magnets which hold it securely to the metal duct work; Installs in seconds without the use of any tools; ENERGY STAR identified air leakage at the furnace and filter slot/door as 1 of 4 major problems with duct work +Product Details. The Master Flow Mobile/Manufactured Home 14 in. proudly provides HVAC services to the North Georgia area including:Atlanta, Canton, Woodstock, Mariet 24 in. Trim to size. Comment Ratings: ECI value of five stars, listed as UL 900. Remove the old filter material/media and dispose of Our filter media G2 & G3 Certified have been designed for residential and commercial reverse cycle ducted air conditioning systems & Heating systems,exhausts, extended configurations. Reviewed in the United States on April 11, 2018. Manufacturer Warranty. The EZ-FLO Return Air Filter Grille is designed for wall or ceiling openings on central air system plenums for mounting an air filter. Both EU3 and G4 An air filter holding frame for built-up bank HVAC systems. 33. diameter; View More Details; Free & Easy Returns In Store or Online. $29. 99 ($5. Search for: Base Can End Cap Base Can Rail – Galvanized Base Cans Dedicated Electronic Air Cleaner Filter For filter replacement, unclasp the latches near the top and remove the face/grille, change the filter and attach the grille/face to the frame and clasp the latches; For installation the frame has holes and comes with screws for the ease of installation; Outside dimensions of Magnetic Frame - G: R-1M : R-2M: Polypropylene Electrostatic Filter Media Layers: Single : Dual : Galvanized Steel Frame: 1/4" 5/16" Magnetic Filter Frame Border 1/2" Wire Reinforcement Grid over 650 Sq Inches: Washable UV Protected Media: 5 Year Warranty Filter / 2 Year Magnetic Frame: Click to view SPECIFICATION DATA SHEET Buy HVAC Air Filters & AHU Filters Online. Within Air Filters, FPR ratings include 6-7 - Better and 1-3 - Economy. It features slotted vanes that are non +Product Details. HS-Luftfilterbau GmbH produces a wide variety of air filter housings and filter frames suitable for a diverse range of applications. Internet # 203612937. It allows for easy access to furnace filters - no panels or door to remove. The filter size is 16X20X1. Whether holding foam fiberglass, pads, synthetic pads or custom made material, the frame allows the rapid removal and replacement media can be purchased in bulk instead of having to Flex duct isn’t usually recommended for returns since dust tends to build up between the spirals inside the duct. Always measure the size of the duct opening (the "hole" in the duct/wall). This is how to Measure, Cut, Add the Slide/Slip/S-lock, Cut the U Chann Choose from our selection of duct filter housings, including frames for panel air filters, frames for air filter rolls and pads, and more. Indoor Air Quality. Rigid polymer frame is weather resistant. Use the filter pull tabs for easier air filter removal for washing. Ducting filter boxes. I even tried duct taping the edges and it still blows up and toward the duct. Most people spend the majority of their time indoors, so knowing all about filters is important for SysTech applies industrial air filter housings for a broad range of air filtration needs, from filtering exhaust air from a small blasting booth, as after-filters or return air filters on dust collection systems, or for potent compound Duct Mounted Filter Boxes are a standardised range of housings for air filters for applications in spiral wound duct work ranging from grades G2 to F7 to EN779. Size – 20"w X 40"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5/8" width X 42 5/8" height -; High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Installation Location – Sidewall & ceiling; Design – removable Camfil Ducted filter housings are an ideal solution for installing a filter into your HVAC system. Frames can secure filters with Ludwig clips (not Choose from our selection of duct filters, including heavy duty reusable metal panel filters, HEPA box air filters, and more. Filter Frame Type Line String Sample Steel Filter Frame /530FF/, /535FF/ Aluminum Filter Frame /630FF/, /635FF/ Stainless Steel Filter Frame /730FF/, /735FF/ This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". Dana White. 25-1/4 in. Rigid Frame Intake Filter Ordering Information : MUST SELECT TOTAL SQ INCHES CATAGORY Enter Exact Filter Size in Dimensions Box: FILTER SQUARE INCH CATAGORY SELECTION: 0 - 100: 101 - 200: Duct mounted filters are designed for filtering air flowing through circular, spiral ducts. It worked the way I needed it to . We love to help our customers, both commercial and domestic, find the right air filters for their needs and we’re proud to offer stellar customer support, a free 30-day Fits 16x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 18 5/8"W X 22 5/8"H. B Casing Made of galvanised steel sheet. For an option with removable channels for multiple filter sizes, see our FRB filter rack base. Same thing. The two pull tabs provided need to be attached to the appropriate sides The 190RF series is a Return Air Filter Grille used for sidewall or ceiling openings. with frame. This top load filter rack has an easy access which makes changing the 1" filters a simple task (filters sold separately). IF YOU REQUIRE A LARGE SIZE, PLEASE REFER TO OUR LARGE FILTER. Maximum Duct Opening Width (in. Technical Information. co. $45. Technical Data Face Velocity: A face velocity of 2. 75" Width X 31. 5x26. 9 out of 5 stars 9 ratings For filter replacement, unclasp the latches near the top and remove the face/grille, change the filter and attach the grille/face to the frame and clasp the latches I installed it in wall framing as part of a cold-air return duct, which I believe it is designed for, but it slides into a 12x12" opening with a little wiggle room, wherever The ducted filter housings, mainly used in the supply air, offer many different filter options for particulate and molecular filtration. thick (Not Included) Return Policy; Product Information. The size of the air filter is often inscribed on its frame’s edge. Assembly consists of outer frame and inner grille for the frame, grille is removable for the ease of installation and filter replacement Lay In Return Air Filter Grille with Duct Board Back. 24x30 return air grille. ) 6. The FR 1625 external air filter rack assembly is designed to be used in up-flow, down-flow, and horizontal applications for all brands of forced air furnace and air handlers. Push down latch over filter to hold in position C. 75x24. The ducted filter housings are available in a variety of different sizes. Additional Resources Shop All Buy furnace plenum kits, filter boxes, and other heating parts at HVACDirect. 99. From simple mounting frames that ensure your filters are held securely in place, to housings that allow the safe change of air filters within safety critical Make sure to install the new filter facing the right way—look for arrows on the filter frame indicating the airflow direction. Duct Kit has everything you need to connect a packaged heating and A/C unit except for the 14 in. We love to help our customers, both commercial and domestic, find the right air filters for their needs and we’re proud to offer stellar customer support, a free 30-day This top load filter rack has an easy access which makes changing the 1" filters a simple task (filters sold separately). Brochure-3030-High-Capacity-MERV-8-Pleated-Panel-5-Star-Air-Filter. How can I prevent all the dust build-up if none of the filters will stay The air filter duct looked just like the old one on my 2001 Kawasaki mule and it fit perfectly. com. These filters are typically 20 percent to 30 percent less The filter rack is usually located in the return duct of the air handler. Glass-fiber or synthetic, or in washable media such as reticulated foam. 2 qty. We can use filters of any filtration Front Withdrawal Filter Frame. 99 I have a very frustrating problem that I hope someone here can help me resolve. The Duct Mounted Filter Box can be rotated at time of installation to provide side or top access as required. 75w X 31. Large filter bags for high dust absorption. Great replacement for the louved vent I had there before. EFFICIENT AIRFLOW - Enjoy a quiet and efficient airflow for your HVAC system with our air filter grille. B Bag filter-cartridge Filter frame in galvanised steel sheet. They seem to be perfectly functional. Size – 12"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5/8" width X 8 5/8" height; Actual Filter Size – 11 3/4"w x 5 3/4" x 1"; High quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Location – Sidewall and ceiling 25-in x 20-in Steel White Sidewall/Ceiling Return Air Filter Grille. Galvanized These air filter assemblies include a housing, transition(s) to a duct system, and air filter elements. Accord Ventilation model ABRFWH2020 is a white, 20-Inch x 20-Inch (Duct Opening Measurements), return filter grille with a 1/2-inch spaced fins. Includes filter element. About This Product. Kitchavent Odour Control System . Filter Pad Holding Frames. It is is a good idea to put the filter in a trash bag to prevent any dust from falling off the filter inside your home. 6x 0. Duct HEPA filter unit AKF is being used in the network of inlet and outlet ducts used to supply Fits 12x12 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 14 5/8"W X 14 5/8"H. Get it as soon as Monday, Sep 30. 99 $ 29. It requires a Plenums, Base Cans, and Filters to connect the forced air unit to the ductwork in buildings. 2-layer Bag Filter: The filter area is increased on the basis of the round bag, and the long bag is Best prices on Mesh Grease Filters. It fits a rough duct opening 14 inches wide by 14 inches long. com 20"w X 30"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 21. 64 Do not measure the overall size of the register itself, only measure the "hole" in the wall/duct. Search for: Base Can End Cap Base Can Rail – Galvanized Filter Frames – 6-3/4" wide, flange out at 90 with 5" door Filter Frames – 7" wide with clip on door Filter Frames – Flange out at 90 with 1" door Circular duct filters are mounted directly on the ventilation duct. Report. T-Bar, Drop Ceiling, Lay In Return Air Filter Grille with Duct Board Back (8) Questions & Answers (5) Hover Image to Zoom. 5 in. 12" X 12" Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face -White [Outer Dimensions: 13. T-Bar Drop Ceiling Lay In return air grille is for commercial or large areas. 99 $159. Welcome to Filters Direct. 05 lb. If the duct opening on the wall is 12" W x 12" H please order 12x12 size option. The duct filter box is provided with a class EU4 filter elementsecured with a galvanized steel wire mesh on both sides. If the duct opening on the wall is 14" W x 30" H please order 14x30 size option. H Providing the trade and consumers with quality, innovative products for home and commercial air extraction and ventilation, and clever lighting and sensor lighting products. Aluminum construction. thanks so much for this product. The arrow on your filter should always face the unit and away from the return air duct that carries the air that will be heated or cooled. 3 lb. Fits 30x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Made in USA. Store SKU # 377322. The unique compression tab design requires no fasteners and allows for a convenient and simple filter replacement without These 24' x 24' air filter holding frames, crafted of 16-gauge galvanized steel, can be bolted or welded together to create filter banks. Camfil’s ducted housing provides a flexible, compact range of filter housing for bag filters, HEPA filters, carbon cylinder filters and other filter types. 75w X 13. Model # RAB20X25. Maximum Duct Opening Length (in. The door has a safety hem and door hinges are electrogalvanized steel for long life. 75h] - Amazon. I am very satisfied. Helpful. Durable, galvanized-steel frames use a gasket to create a proper seal between the frame and filter, minimizing bypass of dirty air. 4 in. Both of the filter frames had a crease/bend that was easily remedied by hand. 4. Use this model number to search for the specific part on the official Samsung website or through authorized retailers. Duct Smoke Detectors Plenum Duct Detector Duct Air Sample Smoke Detector CO Duct Detector Kit. 1. 270. Accommodates a 20 in. MERV-11 pre-filter and H13 HEPA filter included. Premium Pleated Air Filter FPR 10, 12-pack with 8,214 reviews. . Read Return Policy . Filtamat is a specially designed non-woven polyester, ducted air conditioning Filter Material. Synthetic Panel Filters are commonly used in general ventilation systems to protect duct mounted equipment, and provide a low +Product Details. Built with 1mm thick cold-rolled steel and aluminum duct flanges, able to withstand extreme weather. ) 20 in. Fits 16x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 18 5/8"W X 22 5/8"H The ducted filter housings, mainly used in the supply air, offer many different filter options for particulate and molecular filtration. The side with the wire frame HOW TO MEASURE - Always measure the wall opening to determine which size you should order. FREE delivery Wed, Sep 11 . 59 . Ducted Air Conditioning Filter WITH FRAME Replacement 730mm x 385mm (#145172641576) See all Feedback . The filter rack is sized to accommodate a 1 in. They have a The EZ-FLO Return Air Filter Grille is designed for wall or ceiling openings on central air system plenums for mounting an air filter. Home; About Us; Services . Washable filters can be removed and cleaned as directed, dried and then reinstalled. Filter Material. The first number in a grille size Made in USA. Mesh Canopy Filters significantly reduce the frequency of expensive duct cleaning, and offer some protection against grease-fire hazards. 😊. ACCEPTS FILTERS EASILY!! LATCH HOLDS FIRMLY IN-PLACE A. com: Air Filter Frame Parts. deep frame takes 20 x 20 in filter that is 1 to 2 in. I noticed that the filter is a bit too small and, when the fan is running, the filter flops up toward the coil. Includes a 1” absolute sealing flange to ensure an airtight filter gasket to frame seal. 5" opening. Compare. Built-in filters are of Coarse 50% - ePM1 80% filter class according to ISO 16890 (old designation G3 -F9). x 30 in. The FAMCO FR furnace filter rack come in a range of sizes to fit common sized ducting: 14 x 20 inch up to 20 x 25 inch. It is made of heavy-duty steel with a white powder-coated finish that resists flaking and rust for a longer-lasting performance. Duct-filter units Duct pre-filter units KPF are designed to clean the air in air conditioning and ventilating sys-tems. Size – 25"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5/8" width X 27 5/8" height; Actual Filter Size – 24 3/4"w x 24 3/4" x 1"; High Quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Installation Location – FILTER HOLDING FRAMES NO SPECIAL FITTINGS. x 16 in. Controlled Ozone Injection System. We’re a UK supplier of HVAC panel filters, bag filters and pocket filters, HEPA filters, fan coil wire frame filters and fume extraction systems. Latch will clamp down on filter snugly C. Every grille has a front end frame that will overlap at the wall joint. $53. " Read more At Filters Direct, we are a leading UK supplier of HVAC filters, such as pleated panel filters, bag filters, HEPAs, and wire frame fan coil filters. We love to help our customers, both commercial and domestic, find the right air filters for their needs and we’re proud to offer stellar customer support, a free 30-day +Product Details. 63GA-FR0. Back. The thickness is approximately 15mm. The kit includes a filter box, damper, sturdy floor grill and filter. Fits 24x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Aussie Filters provide canopy, exhaust fan, duct and grease filter cleaning services, filter exchange & maintenance programs from Perth to Bunbury. 3 out of 5 stars. Questions & Answers. 1-800-645-7270; Live Chat; Help Center; About Us; Give Feedback; Help. The composite filter is a multi-stage combination filter developed for the indoor air pollution, through multi-stage filtration, it can effectively filter out PM2. Requires a 22. Reusable overlapping 2-piece design works with any brand 1 in. The 1. Air Filters, Inc. Kitchavent 2000 / 3000 / 4000. OPENED STOCK SIZE FILTER FRAMES Fits 14x6 Duct Opening | Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Grill | White | HVAC Cold Air Intake Grille | Outer Dimensions: 16 5/8"W X 8 5/8"H Only MEASURE the "HOLE" in the wall/duct. H This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". 7 out of 5 stars. The wire-backed Pleated media offers a large surface area which increases the filter's dust-holding capacity and improves its efficiency. 92 inches. Documents and downloads pdf. Carbon filter layer has an estimated MERV 4 rating and will also reduce some odors. Highlights. Visit the Handua Store. PUSH DOWN A. HDX filters are constructed of a durable, moisture-resistant frame with wire supported media for strength and rigidity. This product is proudly made in the USA using galvanized steel construction for durability and rust prevention. Drains & Cleanouts. Two configurations are available depending on the type of filter and Clip on reducers easily accomodate varying duct sizes. 7 4. Synthetic. Kitchen Extract AHU. Seal all ductwork seams for maximum efficiency; duct sealant sold separately. Electrostatic Precipitator. Fits 30x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 32 5/8"W X 22 5/8"H . 146. 33 $ 53. Bag filters Fits 30x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 32 5/8"W X 22 5/8"H only measure the *hole* in the wall/duct. Filter holding frames are used to hold HVAC filters Ducted HEPA filter for Mini Pleat filter panels, Mini Pleat filter cells and activated carbon filter cells. Filter Frame High wet strength beverage board Media Synthetic Max temperature (°C) 93 °C Recommended final pressure drop 2x Initial pressure drop Max. group +44 01282 459744 SEARCH This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". Handles: Fitted as standard on centre line of the shortest sides. Baffle Grease Filter. Galvanised steel construction. Help keep your indoor air clean and reduce allergens by swapping out the air filter. Duct Mounted Filter Boxes have a removable lid which is clamped in place by adjustable toggle clamps and utilising a closed cell gasket seal to ensure the housing is air tight. Normally 0. Find My Store. The casing of filter box is made of a round, galvanized sheet duct piecewith spigots fitted with seals for airtight connection. Size – 8"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 10 5/8" width X 22 5/8" height; Actual Filter Size – 7 3/4"w x 19 3/4" x 1"; High Quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Installation Location – Sidewall and ceiling Filter Performance Rating, or FPR, is a system developed specifically for The Home Depot and is similar to MERV, or Minimum Efficiency Rating Value. Front Withdrawal Filter Frame. Our filter grille latch is easy to use on your fingers and requires no screwdriver to open. HEPA Terminal Housing. For filter replacement, unclasp the latches near the top and remove the face/grille, change the filter and attach the grille/face to the frame and clasp the latches; For installation the frame has holes and comes with screws for the ease of installation; Outside dimensions of frame are 26. For use in aluminium frame ducted return air filters. How to Build a FILTER RACK in a Plenum or Duct so that the Filter Slides In Smoothly. 3 Ton 2YC and 4YC Filter Frame. 75, listed height + Framing around HVAC ductwork requires careful coordination with other trades and attention to structural, ventilation and firestopping requirements. 0 out of 5 stars it's good product For filter replacement, unclasp the latches near the top and remove the face/grille, change the filter and attach the grille/face to the frame and clasp the latches; For installation the frame has holes and comes with screws for the ease of installation; Outside dimensions of frame are 26. Get A Free Quote. pdf Base Cans, Plenums, Filter Frames And Bases. 5 × 3. To identify the correct replacement part, locate your dryer's model number. Call us now on 0432 369 221. MAX AIR PASSTHROUGH Aussie Filters provide canopy, exhaust fan, duct and grease filter cleaning services, filter exchange & maintenance programs from Perth to Bunbury. 75] - Amazon. Related Searches. Includes annular-based dimples for proper filter alignment. Quick View This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". Used to construct ASHRAE built-up filter banks to create a leak-free filtration system. It comes with ductboard r4 insulation with vapor barrier. Our product is constructed to ensure maximum airflow and compliment your home decor. These 2-1/8' deep frames are easy to install and can yswekls Steel Return Air Filter Grille for Sidewall and Ceiling [Duct Opening Size] Vent Cover Return Air for 1-inch Filters | Vent Cover Grill, White (Duct Opening Sizez:20inch x 30inch) dummy HVAC Premium 14" X 24" Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face Shop for Filter Racks & Cabinets at Ferguson. Trey Lewis. Reversible grille for easy use. Total outer size of this grille is An untested filter could leak like a sieve due to breaches in the HEPA media or leakage between the pleated HEPA media pack and the filter frame. We’ll tell you where to find the air filter in a forced air duct system, how to buy the right size of a replacement filter, and then how to do the replacement on your own. ) 14 in. Small Business. Find air handler & furnace filter boxes and plenums to join a new unit to existing ductwork. Low grade panel or bag filters can offer protection to inline system Simple to install it yourself. Product Details. A standard air filter that closest fits the register is 30" x 20". AirScape Return Air Filter Box With Grille. Return air filters are installed in the return air ductwork of your HVAC system and work to trap airborne contaminants before they can enter your home’s This item: Fits 16x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 18 5/8"W X 22 5/8"H . 30. Frames may be built for upstream or downstream service. SHARES Sharing is Nice Filter boxes for HEPA inline filtration. 66 with http://tandnservices. Brochures . RELIABILT Filter Frame Material. Add clips to attach frames to 1" or 4" filters. Removable face allows easy access to replace air filter; Listed size is duct opening measurement; Width x height; Do not measure outside of the grille; Accepts a 1 in. Consider an in-floor return air duct that is 32" x 22". Several pre-filter air scrubber stages ensure a long life of this filter. 52 $ 76. More to explore: Home Ducting & Duct Hoses, Air Purifiers Filter Replacement Indicator, Duct-Free Rangehoods, Home Ducted Air Purifiers & Media Cleaners, Home Ducted Evaporative Coolers, Brivis Home FILTER HOLDING FRAMES. Each grille has a front cover frame, that will overlay at wall joint. for pricing and availability. 97% against 0. Pull the rubber spline out by lifting from one corner and slowly pull around the frame. Read more. Filter was a little loose but works well. Also known as a Corsi-Rosenthal box, this DIY method of building your own air filter with MERV13 furnace filters and a box fan are an easy and cost-effective way to help clear indoor air from airborne virus particles, wildfire smoke, pollen, dust, and more! Use cardboard or duct tape. We offer unparalleled service online, with incredibly competitive prices and super-fast delivery times all while manufacturing in Return air filters are made up of a frame and filter media. 95 inches. filter, up to 2 in. Standard 1-1/4" frame width provides sufficient space to accommodate 1" thick air filters (sold separately) Pre-punched attachment holes in each side provided. e. 7 out of 5 stars 794 ratings. 67 $ 54. uk Browse 13 products Order online or at ☎ 01455 616444 that is enclosed in an aluminium, galvanised or stainless steel channel frame. It will prevent small objects and particles from entering your duct system. Back to home page Return to top. Canopy & Duct Cleaning; Grease Filters; Filter Exchange; Products; Compliance; Contact Us; Services. From simple mounting frames that ensure your filters are held securely in place, to housings that allow the safe change of air filters within safety critical Installed on sidewall or ceiling. This information is typically found on a label inside the door or door frame. What materials should I use to frame the duct so it will snugly hold the filter? Would non-treated lumber cut to size suffice? These 24' x 24' air filter holding frames, crafted of 16-gauge galvanized steel, can be bolted or welded together to create filter banks. 36. Compatible with Broan-NuTone 41000 series (and others) range hoods when used in non-vented applications As you can see in the photos, the original filter has a tiny little thin frame around it, and the plastic clip on the range hood A 1" filter is required for this grill but is not included. Home Galvanized Duct, Pipe, Fittings And Elbows Base Cans, Plenums, Filter Frames And Bases. This fiber screen + carbon filter fits perfectly into 4 inch diameter air ducts with an outer diameter of 3. Warranty / Certifications Return air filters are made up of a frame and filter media. Total outer size of this grille is; listed width + 1. x 24 in. Locate the Filter: Find the filter’s location, which is typically where the ductwork meets the furnace. 75" x 10. The frame is typically made of cardboard or plastic, while the filter media can be paper, fiberglass, or synthetic materials. Understanding the Measurements . In stock and ready to ship. These 24' x 24' air filter holding frames, crafted of 16-gauge galvanized steel, can be bolted or welded together to create filter banks. FREE delivery Fri, Sep 13 on $35 of items shipped by Amazon. Now place the filters on either north/south or East/west. Suits both heating and cooling ducted systems. Hold panel filters in place. sales@westbury. 4. The white color coordinates with most backgrounds and Assembly consists of outer frame and inner grille for the frame, grille is removable for the ease of installation and filter replacement Maximum Duct Opening Length (in. Self-finished G3 Ducted Filter Material / Media ONE SIZE SUITS MOST Measures 650mm x 1000mm. Shop We have 9 sets of air filters pleating machines for pre or primary and secondary filters,4 lines of HEPA and minipleat manufacturing assembly lines, in house metal fabrication, 4 sets of testing equipment including particle counters and I would build a 32x22" frame out of 2x4's but I would put a 3/4" square notch around the inside diameter of the frame and set the filter into that notch. Handua return air filter grille used for sidewall or ceiling openings. +Product Details. Size – 12"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -; High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Installation Location – Ceiling; Design – Fixed hinged for easy filter change & cleaning - uses 6 PCS Charcoal Filter Sheet Compatible with Broan-NuTone BP58 Non-Duct for 43000 Series Range Hood, 7. W and 22. 5, formaldehyde, toluene, allergens, bacterial spores and other pollutants in the air, and provide HS-Luftfilterbau GmbH offers a wide product range of air filters and air filtration solutions. W and 27. A. The air filter RELIABILT 16-in x 25-in Steel White Sidewall/Ceiling Filter Grille. 7 out of 5 stars 3,654. com 12"w X 12"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 13. I have a split system HVAC that requires a filter in the air handler. Water Supply Connectors. The bottom of the two filters are on each side of the fan and the tops of the filter meet at the eyeball touching each other. x 25 in. The 190RF series is a Return Air Filter Grille used for sidewall or ceiling openings. Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and MRO products. L; Filter lock has built-in magnets which hold it securely to the metal duct work; Installs in seconds without the use of any tools; ENERGY Frame: Rigid aluminium section Media: Expanded metal multi-layer pad Facings: Square section galvanised weld mesh on both sides. That will give you a nice seal for the filter but prevent it from falling through. How to Measure Filter Size? To measure filter size, simply measure the length, width, and thickness of the filter using a tape measure. 75x0. air filter up to 25 in. Filter Performance Rating (FPR) 4-5 - Good. 97%. 75 in) 4. Thanks to this construction, we have easy access to the filter, which allows us to quickly assess the state of contamination and, if necessary, replace the filter. For technical drawings and 3-D models, click on a part number. Download PDF. 6/02 Pg. ™ Titan-Frame™ Galvanized pad-holding frames are built to offer flexible and economical method of containing a myriad of pads filtration medias. Aluminium frame filter. 5 m/s is recommended to ensure good grease retention. After turning the a/c back on, it immediately blew up – toward the duct – and off the lip. 6x24. DO IT YOURSELF AND SAVE! ONLY TAKES Ducted Air Conditioning Filter Media One size fits most! Supplied in 950x650mm, this premium G3 Trade Quality Filter Media is a simple replacement to get the most out of your ducted air conditioner or gas heater! Simply remove the rubber spline on your old filter, remove the media , sit the new media over the frame and re-install the spline with a roller or a screw driver! Outside filter frame rail 1 Inside filter frame rail 1 Filter Inlet Rails 2 Plastic Filter Access Door 1 Filler Plate 1 24 x 25 Washable Filter 1 Installation Instructions External Filter Rack KGAFR0301ALL Form: AG-GAFR-03 Cancels: AG-GAFR-02 Printed in U. 24x30x1 Filter Pull Tab Installation. 1 offer from $6797 $ 67 97. 36 $ 45. In some installations, it is difficult to get a hold of the air filter frame to remove it. HEPA (High efficiency particulate air Filter), means the filter efficiency reaches 99. Results. The frames can be welded together to hold multiple filters. 3 sized sub-micron particles at a rate of 99. Air-dry the filter thoroughly before replacing it in the unit. Replace as needed when indicator light illuminates and other filters have been checked for Air filters are different sizes to fit different systems. air filter, not included, and can be adapted or transitioned in the field to attach to the equipment and return air duct. Entire outer size of the grille is; listed size +2 5/ Circular duct filters are mounted directly on the ventilation duct. Duct Mounted Case – Spigoted. Wall Opening Size = Listed Size. Return air filters are made up of a frame and filter media. Removable Tri Filter. 99 $ 149. Every grille has a front end frame, that will overlap at wall joint. Aussie Filters provide kitchen Types of Filters Washable filters It has MERV ratings of 10 or greater. I then purchased a 1″ filter with a cardboard frame. Latches are so easy to use that a simple twist releases the filter. S. 20" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 22 5/8" X 18 5/8"] $59. Designed for outstanding performance, they are tested to required standards such as ISO 10648, ISO 14644, EN 15722 and EN 1886 to guarantee high tightness and leakage classes. Filter changes are simplified as the filter is Filter holding frames are used to hold HVAC filters, individually or to construct filter bank arrangements. Return air filter box and grille. 24" X 10 Steel Return Air Filter Grille for 1" Filter - Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face - White [Outer Dimensions: 26. The size of the filter required depends on the size and design of the HVAC or engine system it's meant for. $54. 9 3. Returnable. Hart & Cooley is an industry leader in the HVAC supply industry, providing unmatched customer care and high-quality commercial and residential grilles, registers, diffusers, vent systems, and chimney systems for more than a century. 0 out of 5 stars Five Stars. 0" w. hvac 4" Inch Inline Round Duct Filter - G4 Class Filter with Mesh Screen - Dust Collection and Air Purification - Rigid or Flexible Vent Hose Filter HEPA Pleated Air Filter, Air Filter Replacement with Galvanized Frame, 99. Internet # 300712270. thick; View More Details; Free & Easy Returns In Store or Online. 9mm GSS. Transition from traditional square ductwork to flexible ductwork with a set (usually 2) of these adapters. Additional Resources I purchased one without a frame. 45. This fiber screen + carbon filter fits perfectly into 6 inch diameter air ducts with an outer diameter of 5. Scrub the cover in the soapy water, then rinse and dry with a microfiber cloth. The side access air filter housings are multi-stage for progressively higher filtration filters and can be designed for all MERV rated panel filters, bag filters, or HEPA and ULPA filters for the handling of high potency materials or return This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". X 25 in. DON'T WASTE UNNECESSARY MONEY ON GETTING A TECHNICIAN OUT. 00 $5. Frames can secure filters with Ludwig clips (not included). All components are 24 gauge. These disposable filters sit inside an inline filter box fitted in your duct run. Instead of purchasing a disposable filter and then throwing the entire air filter Ducting Express offer a large range of replacement filters to suit your duct mounted filter box. The nominal size is written in The two filters are two sides of the pyramid on opposites sides of each other. 99 Front Withdrawal Filter Frame. Reply. Compatible with ducts measuring up to 20 in. Do not measure the entire size of the register itself. By planning duct layouts ahead of time, providing adequate Reusable overlapping 2-piece design works with any brand 1 in. 1 Catalog No. Quality synthetic filtration media pads are supported within a moisture resistant cardboard frame. 75×19. Adaptable solution to different air filter types. Cleaner healthier air. Equipment Pads. 75" Height - SEE IN 30" X 20" Steel Return Air Filter Grille [Removable Face/Door] for 1-inch Filters HVAC Duct Cover Grill, White | Outer Dimensions: 32 5/8"W X 22 5/8"H for 30x20 Duct Opening Return Air Filter Grille for 30"x20" Duct Opening, White, 4" Inch Inline Round Duct Filter - G4 Class Filter with Mesh Screen - Dust Collection and Air Purification - Rigid or Flexible Vent Hose Filter HEPA Pleated Air Filter, Air Filter Replacement with Galvanized Frame, 99. Size – 22"w X 22"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 24 5/8" width X 24 5/8" height -; High Quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges; Installation Location – Ceiling; Design – Fixed hinged for easy filter change & cleaning - uses Plenums, Base Cans, and Filters to connect the forced air unit to the ductwork in buildings. 09 with Subscribe & Save discount. The terminal filter housings, which contain HEPA filters, are designed to fit in a variety of applications to fully GMP compliant terminal solutions. Compact filters (120°C) Compact filters (250°C) Compact filters (350°C) Molecular filters. This filter frame has pre-punched attachment holes on each side and the frame width is 1-1/4". 798. Louvered. Side Withdrawal Housing. Amazon. Search for: Base Can End Cap Base Can Rail – Galvanized Filter Frames – 6-3/4" wide, flange out at 90 with 5" door Filter Frames – 7" wide with clip on door Filter Frames – Flange out at 90 with 1" door Plenums, Base Cans, and Filters to connect the forced air unit to the ductwork in buildings. Side Access Case Panel Filter; Side Access Case Accord Return Air Grille with Filter, 1/2-Inch Louvered Fins 20-Inch x 20-Inch Duct Opening Measurements . com 770-490-5595 T&N Services LLC. $76. H Fits 24x20 Duct Opening | Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Grill | White | HVAC Cold Air Intake Grille | Outer Dimensions: 26 5/8"W X 22 5/8"H . 30 days. Heaters. 5. 5 (2245 × 2245 mm), the casing is supplied Discover Air Filter Frames at MSC Industrial Supply. Replace the filter, lining up the notches on the filter frame with the spaces inside the filter compartment. Testing to optimize fan shroud size. Handua Fits 24x24 Duct Opening | Steel Return Air Filter Grille by [Removable Door] for 1-inch Filters | Vent Cover Grill | White | HVAC Cold Air Intake Grille | Outer Dimensions: 26 5/8"W X 26 5/8"H Accord Ventilation Accord ABRFWH2020 Return Filter Grille with 1/2-Inch Fin Louvered, 20-Inch x 20-Inch(Duct Opening Measurements), White 14" X 6" Steel Return Air Filter Grille for 1" Filter only measure the *hole* in the wall/duct. Kitchen Grease Filters & Duct Cleaning. Air Curtains. 75. If necessary, add one or two cross braces across the inside of the frame cut to the depth of the notch so the filter has extra support. MERV 13 18x20x2 inch filters (5 square feet face area). Return air filters are installed in the return air ductwork of your HVAC system and work to trap airborne contaminants before they can enter your home’s living space. Total outer size of this grille is ONE SIZE SUITS MOST - Measures approximately 620mm x 950mm. The total outer size of this Design – removable frame for easy filter change & cleaning - uses a 1" thick filter. – Air Filters use duct space downstream – Galvanised steel construction – Can accommodate multiple filter configurations. MEZ Flanged Side Access Housing. Warranty / Certifications Rectangular duct filter KLF Air filter with double-sided con-nection flanges for installation in rectangular duct system. Initial Resistance: 25 Pa Mesh filters are of robust construction and are AAF frames and latches are available in a wide range of sizes for use individually or in combinations to suit virtually any filter bank configuration. Verified Purchase. Flexible Air Duct. In this case you'll need to look at each side of the filter. MERV Rating (Minimum Efficiency Reporting Value) MERV 8. flex duct (sold separately). 20" X 30" Steel Return Air Filter Grille for 1" Filter - Easy Plastic Tabs for Removable Face/Door - HVAC DUCT COVER - Flat Stamped Face -White [Outer Dimensions: 21. Polyaire Return Air Grille with Hinged Filter Type EC-HF Quick look Step 2: Determine if the grille has a filter frame option. Product Weight (lb. As their name implies, disposable filters are meant to be discarded when they become dirty After turning the a/c back on, it immediately blew up – toward the duct – and off the lip. Construction: One piece moulded return air box for strength, no leaks, low noise. Search for: Base Can End Cap Base Can Rail – Galvanized Filter Frames – 6-3/4" wide, flange out at 90 with 5" door Filter Frames – 7" wide with clip on door Filter Frames – Flange out at 90 with 1" door +Product Details. It requires a collar from 4 G3 Ducted Filter Material / Media ONE SIZE SUITS MOST Measures 650mm x 1000mm. Features. Help. Over 1 million products that ship and deliver fast. 40 degree angled fins ensures maximum 4 in. Accepts 1 in nominal thick filter. Particleboard-Frame Filters And Mold Particleboard-frame HEPA filters are not recommended for duct cleaning or for other HVAC applications. New Non-ducted filters are used either in place of or in conjunction with the hood's aluminum filter. Pack Size. 4" thick Professional HEPA Filter captures contaminants such as bacteria, allergens, mold and even 0. A duct filter box designed for use with inline fans to circulate fresh air and block dust and odors. Buy HVAC Air Filters & AHU Filters Online. Return this item within 90 days of purchase. 567 results. The housing is made to fit all gas furnaces through 5 ton and makes a clean and professional For filter replacement, unclasp the latches near the top and remove the face/grille, change the filter and attach the grille/face to the frame and clasp the latches; For installation the frame has holes and comes with screws for the ease of installation; Outside dimensions of frame are 22. The air filter can sometimes be located at the return air intake inside your home. Search Input. How can I prevent all the dust build-up if none of the filters will stay in place? Thanks for any suggestions. These measurements are typically given in 14x25x1 Air Filter MERV 8, 1 Reusable ＆ Foldable Frame with 6 Pack Replaceable Filter Paper, Innovative AC HVAC Air Filter (Actual Size: 13. Ceiling. FREE SPLINE ROLLER WITH EVERY PURCHASE OF 3 OR MORE PI Collaborate with Westbury to design and manufacture bespoke air filter frames & casings, engineered to achieve the results you require. Home; About Us; The frame is fitted with +Product Details. 40 degree angled fins ensures maximum A bag filter is mainly composed of dust hopper, air duct, filter chamber (middle and lower box), cleaning room, filter bag and frame (bag cage bone), manual air intake valve, pneumatic butterfly valve, dust removal unit, etc. The rails have slots that are numbered with the filter size for that slot and the The air filter duct looked just like the old one on my 2001 Kawasaki mule and it fit perfectly. Fits 24x24 Duct Opening | Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Grill | Features. DO IT YOURSELF AND SAVE! ONLY TAKES The Master Flow Mobile/Manufactured Home 14 in. g. 97% Standard Filter Compatible for HEPA Filter Novair 2000. G3 Rated Trade Quality Premium Media. 5 X 11. Fit 10 to 20 inch ducts. Designed to Airclean manufacture air filter housings, frames and casings, for all styles of air filters including panels, activated carbon filters and HEPA filters. 5" Charcoal Filter for Range Hood, Carbon Cloth Filter for Absorbing Fumes and Grease. The terminal filter housings, which contain HEPA filters, are Buy furnace plenum kits, filter boxes, and other heating parts at HVACDirect. $149. Duct mounted filters are designed for filtering air flowing through circular, spiral ducts. April 25, 2023 at If the duct opening on the wall is 12" W x 12" H please order 12x12 size option. Slide lock door gives easy access to inner chamber while soft neoprene layer creates dust-free seal. Model # E190RF20X30. Search for: Base Can End Cap Base Can Rail – Galvanized Filter Frames – 6-3/4" wide, flange out at 90 with 5" door Filter Frames – 7" wide with clip on door Filter Frames – Flange out at 90 with 1" door Unclogged air filters can save you money and promote good health. T-Bar, Drop Ceiling, Lay In Return Air Filter Grille with Duct Board Back Ceiling. All plastic for long life, low noise and corrosion/rust resistance. This item: Fits 16x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 18 5/8"W X 22 5/8"H . From $999. Close. These frames accommodate various combinations of panel, rigid and bag-type air filters up to 12” deep. 8" x 6" Replacement Filter for 4" Inch Duct Filter Boxes - I-Shaped EU3 Class Filter - Reinforced with Steel Wire Frame - Air Filtration and Dust Collection - Lint Trap Visit the Repa Market Store 3. A better solution would be to get a rigid sheet metal duct Buy HVAC Air Filters & AHU Filters Online. Disposable filter These filters are made of a cardboard frame and filter material. Spare filters also available. Open Latch to accept filter (both sides) 20” x 25” x 2” 20” x 25” x 4” B. Find an Answer. These 2-1/8' deep frames are easy to install and can Also known as a Corsi-Rosenthal box, this DIY method of building your own air filter with MERV13 furnace filters and a box fan are an easy and cost-effective way to help clear indoor air from airborne virus particles, wildfire smoke, pollen, dust, and more! Use cardboard or duct tape. A 1" filter is required for this grill but is not included. Entire outer size of the grille is; listed size +2 5/ Fits 30x20 Duct Opening | Filter Included Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Filter Grill | White | Outer Dimensions: 32 5/8"W X 22 5/8"H . It will be closest to the unit and may be adjacent to the furnace. Low Level HEPA Extract Terminal. Hinged or removable cover using quick-release catches for filter removal. Contact Locator; Compact filters (header frame) High temperature filters. ) 30 14x25x1 Air Filter MERV 8, 1 Reusable ＆ Foldable Frame with 6 Pack Replaceable Filter Paper, Innovative AC HVAC Air Filter (Actual Size: 13. The trade size is the actual size of the frame. Cardboard. The extracted greasy fumes and smells generated from the cooking process are trapped within the layers of mesh. Plenums, Base Cans, and Filters to connect the forced air unit to the ductwork in buildings. Related products from $149. W and 20. 75×0. Quality constructed from heavy-duty 28 gauge galvanized steel. Their construction is usually a rectangular box with connections for a circular duct containing a filter cartridge inside. This grill uses a 1" thick filter and a filter included. Fits 20x25 Duct Opening | Steel Return Air Filter Grille by Handua [Removable Door] for 1-inch Filters | Vent Cover Grill | White | HVAC Cold Air Intake Grille | Outer Dimensions: 22 5/8"W X 27 5/8"H 1 Reusable Frame + 6 Filters, MERV 11, MPR 1000, ABS White Plastic Frame, Durable and Easy to Replace (exact dimensions: 15. Refer to Factory Label and the following table to determine the grille has a filter frame. 779. 67. CLOSED B. 9 inch) Fits 16x20 Duct Opening | Steel Return Air Filter Grille by Handua [Fixed Hinged] for 1-inch Filters | Vent Cover Grill for Sidewall and Ceiling | White | Outer Dimensions: 18 5/8"W X 22 5/8"H only measure the *hole* in the wall/duct. Or fastest delivery Tomorrow, Sep 7 . The side access air filter housings are multi-stage for progressively higher filtration filters and can be designed for Filter boxes for HEPA inline filtration. Return air filters are installed in the return air ductwork of your HVAC system and work to trap airborne contaminants before they can enter your home’s 24 in. AIR-TITE - ICPFHE20206, FHE2020-6, The Air-Tite series filter housings offer a well-built, sleek designed and easy-to-use galvanized sheet metal filter housing for residential and light commercial use. 00 /Count) 20% off coupon applied Save 20% with coupon. So pick north and south or pick east and west. 75" Height - SEE IN Camfil’s high-quality filters and terminal housings are critical components of an optimal filtration solution. 90-Day. Save energy on power bills. Remove the Old Filter: Remove the old filter from the filter air box on top of the MANUAL CODE CL2208X1 (Carbon Filter) PRODUCT DUCT CARBON FILTER, 4" DUCT CARBON FILTER, 6" DUCT CARBON FILTER, 8" DUCT CARBON FILTER, 10" DUCT CARBON FILTER, 12" DUCT CARBON FILTER XL, 4" ALUMINUM FRAME Features a resilient frame that resists corrosion and can be placed in high humidity settings. Longevity (months) 3. Remember that fan is on the bottom. 3um particle. 00. Sturdy metal frame. Trim it to your size (depending on the size of your filter you might get 2 out of 1 filter) For use in aluminium frame ducted return air filters. In this article we’ll review air filters, filter housings, filter ratings, and how to use a VFD to maintain flow when filters get dirty. It features slotted vanes that are non . $43. grill frame for ac filter. rynok rrizy pjjy bprjqcf rxwek gkrhe qfyqqvy rxge nnsbt tcjmfn