SKU: 98147639585

AC Infinity Air Filter Box w/ High Efficacy Filter 4-Inch

$107.10 $119.00
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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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Description

AC Infinity Air Filter Box w/ High Efficacy Filter 4-InchDescription 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. Specifications Product Identification Manufacturer: AC Infinity Inc. Product Name: Air Filter Box 4" Product Model: AC AFB4 UPC Code: 819137021693 Product and Mounting Dimensions Duct Opening Size: 3. 81 in. (9. 7 cm) Total Dimensions: 23.

Description
  • 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.

    • Specifications
  • Product Identification
  • Manufacturer: AC Infinity Inc.
  • Product Name: Air Filter Box 4"
  • Product Model: AC-AFB4
  • UPC Code: 819137021693
  • Product and Mounting Dimensions
  • Duct Opening Size: 3.81 in. (9.7 cm)
  • Total Dimensions: 23.46 x 8.42 x 11.73 in. (59.6 x 21.4 x 29.8 cm)
  • Flange Size: 3.21 in. (8.2 cm)
  • Box Material: Steel
  • Flange Material: Aluminum
  • Finish: Matte Black
  • Filter Size: Accepts 12 x 20 x 1
  • Minimum Airflow Range: 80-120 CFM
  • Maximum Airflow: 400 CFM
  • Compatible Fan Models: CLOUDLINE S4, CLOUDLINE T4
    • Data Sheets
  • Download the user manual: here
    • Kit Contents
  • a standard high efficacy filter that traps particles like dust
  • dirt
  • lint
  • and odor.
  • 23.46 x 8.42 x 11.73" | Fits 4" Inline Fans | 400 CFM Maximum | Accepts 12 x 20 x 1" Filters
  • Product 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.
  • Applications: 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
  • Odor
  • The duct flanges fit with matching sized 4" inline fans and enable a streamlined installation to create high efficiency filtration in HVAC and grow applications. Attaching the air filter box in 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.
    • Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 98147639585

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    4.7 ★★★★★
    Based on 9 reviews
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    Product Reviews
    M
    Manny
    Los Angeles, US
    ★★★★★ 5
    Easy DIY replacement
    This engine and cabin air filter kit was an easy and worthwhile replacement for my vehicle. Both filters fit exactly as expected and matched the originals in size and shape. Installation was quick and straightforward. The cabin air filter slid right into place, and the engine air filter seated properly with no gaps or bending. Airflow immediately felt improved, and there were no warning lights or fitment issues after installation. The filters appear well made and sturdy, not flimsy or overly thin. It’s convenient having both the engine and cabin filters included in one kit instead of purchasing them separately, especially for routine maintenance. If you drive a compatible CR-V or Civic and want a simple, cost effective DIY replacement, this kit does the job well and saves time.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 21, 2026
    Z
    Zero Boss
    Port Orchard, US
    ★★★★★ 5
    Easy-to-Install Air Filter Kit for Civic
    This engine and cabin air filter kit is a great choice for keeping your Civic running smoothly. Installation was straightforward, everything fit perfectly with no modifications needed, and the filters feel solid and well-made. After replacing them, the cabin air feels noticeably fresher, and the engine seems to breathe more easily. It’s convenient to replace both the engine and cabin filters at the same time, and the kit includes everything you need for a hassle-free swap. Overall, a reliable and practical kit for anyone looking to maintain their vehicle’s performance and improve interior air quality.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 29, 2026
    M
    MiKeM
    Natrona Heights, US
    ★★★★★ 5
    Good value, fit 2023 CRV 1.5L
    These filters arrived wrapped in plastic in a cardboard box, shipped in a standard Amazon box. Initial quality seems very good. I've previously used store brand filters and oem filters in our 2023 CRV 1.5L, and these look comparable. They fit fine. If you have not changed your filters, there are good youtube videos that show how to do it, the CRV is well supported and pretty straightforward without having to buy a bunch of special tools. If you don't want to spend $100 at the dealership, these are a good value and only take about 5-10 minutes total to change once you have done it a few times. First time out, give yourself 30 minutes and be patient!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 7, 2026
    D
    "Dave From Jersey"
    Lake Worth, US
    ★★★★★ 5
    Fits Perfectly. Can't beat the price. Don't Hesitate....
    Actually this filter combo fits my customers car perfect. Some after market filters you have to finagle a little to make them fit, however this engine air filter and cabin filter fit perfect...Great deal for both filters.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 14, 2026
    J
    J Lit
    Port Orchard, US
    ★★★★★ 5
    They fit perfectly //// appear equal or better quality
    They fit perfectly and appear to be equal or better quality than the OEM filters.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 18, 2026

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