what filter fits perfect in the 4" filter box?

the 4" and 6" filters take 12x20x1" filters; the 8 and 10" box's take 14x20x1" filters

What filter replacement is suggested for the 6" filter box? standard 20x12x1 does not fit.

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.

Do the filters trap smoke from pipes or pollen and mildew?

No, you need a carbon filter for smoke

Can I use a MERV 17 or HEPA filter instead of a MEV13 filter for additional filtration if they will even fit?

I use the HDX FPR 12 Ultimate Allergen with odor reduction. This filter is a higher end filter.

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AC Infinity 4-Inch Inline Filter Box with High Efficacy Filter

Product ID: 411085075

Details

Brand
AC Infinity
Compatible devices
CLOUDLINE S4
Filter Mounting Type
Slide In
Filter Shape
Rectangular
Item weight
6.42 Kilograms
MERV rating
13

🦠MERV 13 filter blocks 0.3-1.0 micron particles

🌬️400 CFM max airflow

🛠️1mm cold-rolled steel build

Bs.13533

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Description

🌿 Breathe smarter, live fresher — your home's invisible shield against airborne intruders!

EFFORTLESS MAINTENANCE - Slide-lock door with neoprene seal offers quick, dust-free filter changes without hassle.
SEAMLESS HVAC INTEGRATION - Designed to fit 4-inch inline fans like the CLOUDLINE series for streamlined installation and optimal performance.
MAXIMUM AIRFLOW EFFICIENCY - Supports up to 400 CFM, ensuring powerful fresh air circulation throughout your home.
INDUSTRIAL GRADE DURABILITY - Crafted from 1mm thick cold-rolled steel and aluminum flanges for weatherproof resilience.
ADVANCED PARTICLE FILTRATION - Includes a MERV 13 pleated filter that traps viruses, dust, pollen, and mold spores for cleaner indoor air.

The Inline Filter Box 100mm is a robust whole-house HVAC filtration kit engineered with 1mm cold-rolled steel and aluminum flanges. It fits 4-inch inline duct fans, delivering up to 400 CFM airflow while housing a high-efficacy MERV 13 filter that captures microscopic particles including viruses and pollen. Its slide-lock door with neoprene sealing ensures easy, dust-free filter replacements, making it an essential upgrade for millennial professionals seeking cleaner, healthier indoor air and seamless integration with their CLOUDLINE fan systems.

Specifications

ASIN	B0921N33Y7
Best Sellers Rank	261,464 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,301 in Registers, Grilles & Vents
Brand Name	AC Infinity
Compatible Devices	CLOUDLINE S4, CLOUDLINE T4
Compatible Hvac Systems	Residential
Country Of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (105)
Filter Mounting Type	Slide In
Filter Shape	Rectangular
Item Dimensions L x W x Thickness	59.6L x 21.4W x 29.8Th centimetres
Item Highlight	HVAC Filtration Kit, Fits 100mm Inline Duct Fans for Fresh Air Intake and Ventilation, 4-Inch
Item Weight	6.42 Kilograms
MERV Rating	13
Manufacturer	AC Infinity
Manufacturer Part Number	AC-AFB
Material Type	Alloy Steel
Model Number	AC-AFB4
Number of Items	1
Number of Packs	1
Product Grade	new
UPC	819137021693
Unit Count	1.0 count

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Bs.13533

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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