---
product_id: 311970889
title: "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: "€ 434.84"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ac Infinity"
url: https://www.desertcart.pt/products/311970889-inline-filter-box-6-with-high-efficacy-filter-whole-house
store_origin: PT
region: Portugal
---

# MERV 13 high efficacy filter traps dust & odors 800 CFM max airflow capacity 1mm thick cold-rolled steel & aluminum build 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:** € 434.84
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your air game — because fresh air is the new luxury.

## Quick Answers

- **What is this?** 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?** € 434.84 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/311970889-inline-filter-box-6-with-high-efficacy-filter-whole-house)

## 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 soft neoprene seal ensures dust-free access and quick filter swaps without hassle.
- • **Seamless Compatibility:** Designed to fit 6-inch inline fans and standard 12x20x1” filters, making upgrades and replacements a breeze.
- • **Quiet & Efficient Airflow:** Supports up to 800 CFM airflow, optimizing ventilation while maintaining whisper-quiet operation for your workspace or home.
- • **Rugged Industrial Strength:** Built with heavy-gauge cold-rolled steel and aluminum flanges to withstand extreme weather and daily wear.
- • **Breathe Cleaner, Live Better:** Includes a MERV 13 rated filter that efficiently traps dust, dirt, lint, and odors for fresher indoor air.

## Overview

The AC Infinity Inline Filter Box 6" is a premium duct filter designed for 6-inch inline fans, featuring a durable 1mm cold-rolled steel and aluminum construction. It includes a high-efficacy MERV 13 filter that traps dust, dirt, lint, and odors, supporting up to 800 CFM airflow. Its slide lock door with neoprene seal allows easy, dust-free filter changes, making it ideal for improving indoor air quality in residential HVAC systems.

## Description

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 - desertcart.com

Review: Great box, worth the money! - 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.
Review: Great Fresh Air System - Filter Out Wildfire Smoke - 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.

## 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 | #45,499 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #319 in Furnace Filters |
| Brand | AC Infinity |
| Brand Name | AC Infinity |
| Compatible Devices | AC Infinity CLOUDLINE Series inline duct fans |
| Compatible Hvac Systems | residential |
| Customer Reviews | 4.6 out of 5 stars 332 Reviews |
| 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 |
| MERV Rating | 13 |
| Manufacturer | AC Infinity |
| Manufacturer Part Number | AC-AFB |
| Material | Cold-rolled steel, Aluminum |
| Material Type | Cold-rolled steel, Aluminum |
| Model Number | AC-AFB6 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Dimensions | 23.46"L x 8.42"W x 0.46"Th |
| Product Grade | like new |
| UPC | 819137021709 |
| Unit Count | 1 Count |

## 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

![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)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great box, worth the money!
*by T***D on 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.

### ⭐⭐⭐⭐⭐ Great Fresh Air System - Filter Out Wildfire Smoke
*by M***S on 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.

### ⭐⭐⭐⭐⭐ I found a replacement filter for the 6" model
*by N***M on December 30, 2022*

We used this 6" model for a fresh make up air for our house. Reading the review we realized people were upset that AC Infinity doesn't sell replacement air filters and those readily available filters at the big box store won't fit. If you are searching for a replacement then buy the Nordic Pure 12x20x1. Amazon sells this brand of filter as well. The actual measurements for this filter is: 11.5 x 19.5 x 0.75 inches. Although this air filter is about 0.25-.05 in short on the length and width, it still fit the air box and the seal is still in tact. See pictures for a visual illustration and reference my finger. As for the air box itself, this is a well constructed and high quality air inbox. This is expensive but I believe the quality and craftsmanship justified the price. I hope this review helps.

## 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.pt/products/311970889-inline-filter-box-6-with-high-efficacy-filter-whole-house](https://www.desertcart.pt/products/311970889-inline-filter-box-6-with-high-efficacy-filter-whole-house)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-08-27*