--- product_id: 311970889 title: "AC Infinity Inline Filter Box 6\" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation" brand: "ac infinity" price: "£245.71" currency: GBP in_stock: true reviews_count: 13 url: https://www.desertcart.co.uk/products/311970889-ac-infinity-inline-filter-box-6-with-high-efficacy-filter store_origin: GB region: United Kingdom --- # MERV 13 high efficacy filter 800 CFM max airflow capacity 1mm cold-rolled steel & aluminum build AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation **Brand:** ac infinity **Price:** £245.71 **Availability:** ✅ In Stock ## Summary > 🌿 Breathe smarter, live fresher — your home's invisible shield against dust and odors! ## Quick Answers - **What is this?** AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation by ac infinity - **How much does it cost?** £245.71 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/311970889-ac-infinity-inline-filter-box-6-with-high-efficacy-filter) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Maintenance:** Slide lock door with neoprene seal ensures quick, dust-free filter swaps without hassle. - • **Seamless HVAC Integration:** Fits standard 6-inch inline duct fans and accepts common 12x20x1” filters for easy upgrades. - • **Rugged Weatherproof Design:** Built with 1mm thick cold-rolled steel and aluminum flanges for durability in any climate. - • **Advanced Particle Filtration:** Includes a MERV 13 filter that traps 0.3-1.0 micron particles—dust, lint, odors—keeping your air pristine. - • **Powerful Airflow Compatibility:** Supports up to 800 CFM, perfectly paired with high static pressure inline fans like CLOUDLINE Series. ## Overview The AC Infinity Inline Filter Box 6" is a robust whole-house air filtration solution designed for 6-inch inline duct fans. Constructed from 1mm thick cold-rolled steel with aluminum flanges and a matte black powder coat, it withstands harsh weather while delivering up to 800 CFM airflow. Equipped with a MERV 13 high efficacy filter, it captures fine particles down to 0.3 microns, including dust, lint, and odors. Its slide lock door with neoprene seal allows easy, dust-free filter changes, making it an ideal upgrade for residential HVAC systems seeking cleaner, fresher air. ## Description A whole-house air filtration system designed for use with inline duct fans such as the CLOUDLINE Series, to circulate fresh air by blocking particles like dust and dirt from entering your home in intake applications. Each air filter box is built using 1mm thick cold-rolled steel and finished with matte black powder coating. This outer body build comes together with aluminum duct flanges to create a sturdy build capable of withstanding inclement weather. Its low-maintenance design features a hinge-sealed door equipped with a slide lock that provides easy access to the inner chamber. The door is lined with a soft neoprene layer that keeps the filter in place and dust from seeping inside. Each air filter box accepts standard MERV filter replacements that slide into the inner chamber’s filter slot. Comes included with a high-efficacy pleated air filter, capable of trapping 0.3-1.0 micron-sized particles such as: Dust Dirt Lint Odor The duct flanges fit with matching-sized inline fans and enable a streamlined installation to create high-efficiency filtration in HVAC and grow applications. Attaching the air filter box to the starting end of your ductwork will dramatically reduce suspending particles in the air inside your home. Use with a high static pressure fan like the CLOUDLINE Series of duct fans is highly recommended to ensure maximum filtration. Intake air filtration system designed to circulate fresh air and block particles from entering indoor settings. When used with a high static pressure duct fan, filter boxes can not only purify the air with maximum efficiency but also provide light cooling to improve comfort. Place this filter box at the beginning of your ductwork to keep dust, dirt, lint, and odors out, reducing suspending particles inside your home. Made of 1mm thick cold-rolled steel and aluminum duct flanges with a matte black powder coating finish encasing the interior filter, held in place by neoprene padding. Slide lock hatch system provides quick access to the inner chamber's filter slot for direct and speedy replacement, accepting standard-sized MERV filters. Includes a high efficacy filter capable of blocking smaller 0.3-1.0 micron particles at a 90% efficiency rating like dust, lint, and welding fumes. AC Infinity is a technology company that specializes in environmental controls for audio/video and HVAC. The company was founded on the principle of working closely with customers to develop great products. Dependable service and a commitment to product quality are the foundations of the business's values. ## Features - A duct filter box designed for use with inline fans to circulate fresh air and block dust and odors. - Built with 1mm thick cold-rolled steel and aluminum duct flanges, able to withstand extreme weather. - Slide lock door gives easy access to inner chamber while soft neoprene layer creates dust-free seal. - Includes a standard high efficacy filter that traps particles like dust, dirt, lint, and odor. - 23.46 x 8.42 x 11.73” | Fits 6” Inline Fans | 800 CFM Maximum | Accepts 12 x 20 x 1” Filters ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0921XRFLX | | Best Sellers Rank | #41,219 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #320 in Furnace Filters | | Brand Name | AC Infinity | | Compatible Devices | AC Infinity CLOUDLINE Series inline duct fans | | Compatible Hvac Systems | residential | | Customer Reviews | 4.6 4.6 out of 5 stars (329) 4.6 out of 5 stars | | Filter Mounting Type | Slide In | | Filter Shape | Rectangular | | Item Dimensions L X W X Thickness | 23.46"L x 8.42"W x 0.46"Th | | Manufacturer | AC Infinity | | Manufacturer Part Number | AC-AFB | | Material Type | Cold-rolled steel, Aluminum | | Merv Rating | 13 | | Model Number | AC-AFB6 | | Number Of Items | 1 | | Product Grade | like new | | Unit Count | 1 Count | | Upc | 819137021709 | ## Product Details - **Brand:** AC Infinity - **Compatible Devices:** AC Infinity CLOUDLINE Series inline duct fans - **Filter Mounting Type:** Slide In - **Filter Shape:** Rectangular - **MERV Rating:** 13 - **Manufacturer:** AC Infinity - **Material:** Cold-rolled steel, Aluminum - **Number of Items:** 1 - **Product Dimensions:** 23.46"L x 8.42"W x 0.46"Th - **UPC:** 819137021709 ## Images ![AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation - Image 1](https://m.media-amazon.com/images/I/51ZtOdXVjiL.jpg) ![AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation - Image 2](https://m.media-amazon.com/images/I/51keHQnx4lL.jpg) ![AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation - Image 3](https://m.media-amazon.com/images/I/51NyArbfr0S.jpg) ![AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation - Image 4](https://m.media-amazon.com/images/I/61yP1T29OcL.jpg) ![AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation - Image 5](https://m.media-amazon.com/images/I/61eR-OdTnqL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great box, worth the money! *by on Reviewed in the United States October 8, 2025* Great filter box. Built with good materials. Hinges are smooth and the latch is solid and looks and works great. I used this for my fresh air intake with a motorized damper for my A/C system. The inlet and outlet flanges were true to size and the door sealed very well with no leakage. It was easy to install and remove the included filter. This is heavy gauge metal and makes the box have some weight to it, so be prepared to have a way to mount or hang it. It's easy to tell this is a good product. The shipping box and packing were really nice....I hated to throw it away. You get quality with this box, it's worth the money, which is hard to find these days. ### ⭐⭐⭐⭐⭐ Filter box review *by on Reviewed in the United States April 18, 2026* The filter box was delivered as scheduled and very well packaged.Product is well designed, fabricated and finished. There are "no" sharp edges from manufacturing.Keep in mind there are no provisions or suggestions for hanging or mounting. Drilling four holes for mounting potentially voids any warranty. I used #10 lag screws supplemented with 1.5" fender washers. ### ⭐⭐⭐⭐⭐ Great Fresh Air System - Filter Out Wildfire Smoke *by on Reviewed in the United States December 3, 2023* I live in an area plagued by wildfire smoke and every year gets worse. I live in a Valley so temperature inversions are common and many of my neighbors have wood buring stove and some even illegally burn thei household garbage.I have indoor air cleaners which keep my indoor air quality index (AQI) very low, 1 to 4. However, Carbon Dioxide (CO2) levels get very high, especially in the bedroom when it can reach as high a 1400 ppm in the morning. Anything above 1000 ppm can cause headaches, fatigue, and other health issues.I assembled the system pictured it consists of the following:* AC Infinity Inline Filter Box fitted with Filterbuy 12x20x1 MERV 13 rated filters* AC Infinity Cloudline Pro S4 Inline Duct Fan* AC Infinity Flexible 4-inch Aluminum 4 layer HD Flex Hose (25')* Broan-NuTine 465B 4" to 5" Duct Adaptor* Gulrear Portable AC Window Vent Kit 5"I assembled these components and it allows me to draw in air from the outside, filter it, and disperse into the room. The 25' hose allowed me to place the outlet just below the top of the ceiling where monitoring have indicated is the best location.I use the IQ Air Airvisual Pro N1 indoor air quality monitor in the bedroom to track the AQI Index and most importantly for this purpose, the CO2 level. Prior to installing this system my highest reading in the morning averaged 950 ppm. Now I average 650 ppm. My 24 hour/day monthly average went from 735 ppm to 588 ppm.I am very pleased with the performance of the system and achieved my goal of reducing CO2 levels when I am unable to open the windows due to unhealty outdoor air quality.The AC Infinity products are of excellent quality and the inline Duct Fan is very quiet. I leave set at the 5 (out of 10) power level and it is very quiet. The combination of my air cleaner and the AC Infinity fan makes a great white noise level for restful sleep.In the pictures you will see how I have hidden some of the components under a chair. You can also see the hose outlet hidden behind the flower vase on top of the armoire.Update: Condensation inside the filter box was a concern, but with outside temps since installing in mid-October ranging from 65° to 22° F we have had zero moisture build up inside the filter box. Dry as a bone. ## Frequently Bought Together - AC Infinity Inline Filter Box 6" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 6-Inch Inline Duct Fans for Fresh Air Intake and Ventilation - AC Infinity Flexible 6-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust - AC Infinity CLOUDLINE PRO S6, Quiet 6” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/311970889-ac-infinity-inline-filter-box-6-with-high-efficacy-filter](https://www.desertcart.co.uk/products/311970889-ac-infinity-inline-filter-box-6-with-high-efficacy-filter) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-12*