---
product_id: 411085075
title: "Inline Filter Box 100mm with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 100mm Inline Duct Fans for Fresh Air Intake and Ventilation, 4-Inch"
brand: "ac infinity"
price: "€ 538.85"
currency: EUR
in_stock: true
reviews_count: 6
category: "Ac Infinity"
url: https://www.desertcart.hr/products/411085075-inline-filter-box-100mm-with-high-efficacy-filter-whole-house
store_origin: HR
region: Croatia
---

# MERV 13 high-efficiency filtration 400 CFM max airflow 1mm cold-rolled steel durability Inline Filter Box 100mm with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 100mm Inline Duct Fans for Fresh Air Intake and Ventilation, 4-Inch

**Brand:** ac infinity
**Price:** € 538.85
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Inline Filter Box 100mm with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 100mm Inline Duct Fans for Fresh Air Intake and Ventilation, 4-Inch by ac infinity
- **How much does it cost?** € 538.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/411085075-inline-filter-box-100mm-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

- • **Seamless Integration:** Fits standard 100mm (4-inch) inline duct fans and accepts common 12x20x1” filters for easy upgrades.
- • **Effortless Maintenance:** Slide lock door with neoprene seal offers quick, dust-free filter changes without hassle.
- • **Breathe Cleaner, Live Better:** Includes a MERV 13 filter that traps viruses, pollen, dust, and mold spores for healthier indoor air quality.
- • **Powerful Airflow, Quiet Operation:** Supports up to 400 CFM airflow, balancing fresh air intake with minimal noise disruption.
- • **Built to Last, Designed to Protect:** Robust 1mm cold-rolled steel and aluminum flanges ensure weatherproof durability for year-round performance.

## Overview

The AC Infinity Inline Filter Box is a premium 4-inch HVAC filtration solution featuring a durable 1mm cold-rolled steel body and aluminum flanges. Equipped with a high-efficiency MERV 13 filter, it effectively captures airborne contaminants like viruses, pollen, and dust. Designed for easy maintenance with a slide lock door and neoprene seal, it fits standard 100mm inline duct fans and supports up to 400 CFM airflow, making it ideal for whole-house fresh air intake and ventilation.

## Description

AC Infinity Inline Filter Box 100mm with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 100mm Inline Duct Fans for Fresh Air Intake and Ventilation, 4-Inch : desertcart.co.uk: DIY & Tools

Review: Works as it should - Bit pricey but did the job. Keeps intake air clean but needs filter replacing often. Can tell its decent durable build as its metal. Not too noisy however it does have that familiar air ducting noise.
Review: Keine Pollen vom Nachbarn mehr , die meine Pflanzen Samen lassen. Wirkt auf den ersten Blick sehr gut verarbeitet. Es ist mein erstes Produkt von AC Infinitiv und ich bin überrascht wie gut es ist.

## Features

- A duct filter box designed for use with inline fans to circulate fresh air and block contaminants.
- 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 MERV 13 filter that traps particles like viruses, dust, pollen, and mold spores.
- 23.46 x 8.42 x 11.73” | Fits 4” Inline Fans | 400 CFM Maximum | Accepts 12 x 20 x 1” Filters

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0921N33Y7 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 128,793 in DIY & Tools ( See Top 100 in DIY & Tools ) 606 in Registers, Grilles & Vents |
| Colour | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (292) |
| Date First Available | 7 April 2021 |
| Item Package Quantity | 1 |
| Item Weight | 6.42 kg |
| Item model number | AC-AFB4 |
| Manufacturer | AC Infinity |
| Material | Alloy Steel |
| Minimum Efficiency Reporting Values (MERV) | 13 |
| Part Number | AC-AFB |
| Product Dimensions | 2.35 x 1.17 x 0.84 cm; 6.42 kg |
| Size | 59.6 x 21.4 x 29.8 cm |
| Style | MERV 13 |

## Product Details

- **Brand:** AC Infinity
- **Compatible devices:** Air Conditioner
- **Item weight:** 6.42 Kilograms
- **MERV rating:** 13
- **Manufacturer:** AC Infinity
- **Material:** Alloy Steel
- **Number of items:** 1
- **Product dimensions:** 59.6L x 21.4W x 29.8Th centimetres
- **Product grade:** new
- **UPC:** 819137021693

## Images

![Inline Filter Box 100mm with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 100mm Inline Duct Fans for Fresh Air Intake and Ventilation, 4-Inch - Image 1](https://m.media-amazon.com/images/I/41EWnjz-1aS.jpg)

## Questions & Answers

**Q: what filter fits perfect in the 4" filter box?**
A: the 4" and 6" filters take 12x20x1" filters; the 8 and 10" box's take 14x20x1" filters

**Q: What filter replacement is suggested for the 6" filter box?  standard 20x12x1 does not fit.**
A: Different brands of filters have different "actual" sizes.  Look up the true size of the filter you are using, then check actual filter sizes for different brands that are smaller.

**Q: Do the filters trap smoke from pipes or pollen and mildew?**
A: No, you need a carbon filter for smoke

**Q: Can I use a MERV 17 or HEPA filter instead of a MEV13 filter for additional filtration if they will even fit?**
A: I use the HDX FPR 12 Ultimate Allergen with odor reduction. This filter is a higher end filter.

## Customer Reviews

### ⭐⭐⭐ Works as it should
*by A***S on 27 December 2025*

Bit pricey but did the job. Keeps intake air clean but needs filter replacing often. Can tell its decent durable build as its metal. Not too noisy however it does have that familiar air ducting noise.

### ⭐⭐⭐⭐⭐ Review
*by O***S on 14 October 2025*

Keine Pollen vom Nachbarn mehr , die meine Pflanzen Samen lassen. Wirkt auf den ersten Blick sehr gut verarbeitet. Es ist mein erstes Produkt von AC Infinitiv und ich bin überrascht wie gut es ist.

### ⭐⭐⭐⭐⭐ Review
*by R***K on 28 December 2024*

well made and it works perfectly

## Frequently Bought Together

- AC Infinity Inline Filter Box 4" with High Efficacy Filter, Whole House HVAC Filtration Kit, Fits 4-Inch Inline Duct Fans for Fresh Air Intake and Ventilation
- AC Infinity CLOUDLINE PRO S4, Quiet 4” Inline Duct Fan with Speed Controller – EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-08*