AC Infinity 4" Inline Filter Box with High Efficiency Filter, Whole House HVAC Filter Kit, Fits 4" Inline Duct Fans for Fresh Air Intake and Ventilation

AC Infinity 4" Inline Filter Box with High Efficiency Filter, Whole House HVAC Filter Kit, Fits 4" Inline Duct Fans for Fresh Air Intake and Ventilation

Q: 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

Q: 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.

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

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?

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

4.5/5

Product ID: 733392801

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Details

Brand
AC Infinity
Material
Alloy Steel
Compatible Devices
CLOUDLINE S4
Item Weight
6.42 Kilograms
UPC
819137021693
Number of Items
1

⚙️1mm cold-rolled steel & aluminum build

🌬️Supports up to 400 CFM airflow

🛡️MERV 13 high-efficiency filter

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

Description

🌿 Breathe smarter, live better — upgrade your air game now!

ADVANCED AIR PURIFICATION - MERV 13 filter traps viruses, pollen, dust & mold for cleaner, healthier air.
SEAMLESS MAINTENANCE ACCESS - Sliding lock door with neoprene seal offers quick, dust-free filter changes without hassle.
WHOLE HOUSE FRESH AIR SOLUTION - Integrates easily with HVAC systems to elevate your indoor air quality and comfort.
OPTIMIZED AIRFLOW COMPATIBILITY - Perfectly fits 4" inline duct fans and supports up to 400 CFM for efficient ventilation.
DURABLE WEATHER RESISTANT DESIGN - Robust 1mm cold-rolled steel and aluminum flanges ensure long-lasting performance in any climate.

The AC Infinity 4" Inline Filter Box is a premium HVAC accessory designed to fit 4" inline duct fans, supporting up to 400 CFM airflow. Constructed from durable 1mm cold-rolled steel and aluminum, it features a high-efficiency MERV 13 filter that captures viruses, dust, pollen, and mold spores. Its sliding lock door with a neoprene seal ensures easy, dust-free maintenance, making it an essential upgrade for whole-house fresh air intake and superior ventilation.

Specifications

Brand Name	AC Infinity
Select	AC-AFB4
Part Number	AC-AFB
Compatible Device	CLOUDLINE S4, CLOUDLINE T4
Material	Alloy Steel Aluminum
Batteries Included	No
Batteries Required?	No
Item Dimensions L x W x H	23 x 12 x 8 mm
Item Weight	6.42 Kilograms

Have a Question? See What Others Asked

what filter fits perfect in the 4" filter box?

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

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

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

Common Questions

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TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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Fantastic experience overall. Will recommend to friends and family.

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