Two black AC Infinity pre-filter cloths with blue logos, positioned close together.

AC Infinity pre-filter cloth with dimensions shown in inches and centimeters.

AC Infinity air filter with polyester fiber material, form fitting design, and 100% air passthrough.

Black AC Infinity pre-filter cloth with blue label, covering a cylindrical filter with a black mesh opening.

AC Infinity inline fan with pre-filter cloth and tomato plant.

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AC Infinity 4" Pre-Filter Cloth for Inline Carbon Filter

Price:

$9.99 USD

Pay as little as
$999/mo

for a term that suits you, up to 36 months.

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AC Infinity 4" Pre-Filter Cloth for Inline Carbon Filter - 2 Pack

Is dust and debris clogging your carbon filter and reducing its effectiveness? The AC Infinity 4" Pre-Filter Cloth is your first line of defense, designed to capture larger particles before they reach the carbon bed. This simple addition significantly extends the life and performance of your 4" carbon filter.

This two-pack of custom-fitted cloth covers maintains optimal breathability, ensuring your inline fan doesn't have to work harder, all while preserving your filter's odor-controlling capabilities. Easy to install and maintain, each pre-filter can be machine washed and reused for up to six months, providing a cost-effective solution for any clean air system from AC Infinity.

What's Included

2 x 4" Pre-Filter Cloths

Features

🛡️

Extends Filter Life

Captures dust and large particles, preventing clogs and prolonging the carbon's effectiveness.

💨

Maintains Airflow

Breathable polyester material ensures your fan operates efficiently without added strain.

♻️

Washable & Reusable

Easily machine washable for multiple uses, offering excellent value and reduced waste.

✅

Simple Installation

The elastic band allows you to effortlessly slip the cover over your filter in seconds.

🎯

Perfect Fit

Specifically designed to fit AC Infinity 4-inch duct carbon filters for seamless coverage.

⏳

Long-Lasting Use

Each pre-filter cloth is durable enough to last up to six months with regular cleaning.

Specifications

Specification	Value
Duct Opening Size	4"
Total Dimensions	6.96 x 9.84 in. (17.7 x 25.0 cm)
Thickness	0.05" (1.5 mm)
Material	Polyester
Design	Pre-Cut
Recommended Circulation	6 Months

Warranty

As a consumable item designed for filtration, this pre-filter cloth is not covered under the standard AC Infinity two-year warranty. All sales are final. We recommend inspecting the product upon arrival for any defects.

FAQs

How often should I wash the pre-filter?+

We recommend checking the pre-filter monthly and washing it whenever you notice a significant buildup of dust or debris. A clean pre-filter ensures optimal airflow and filtration.

Will this fit other brands of 4" carbon filters?+

This pre-filter is specifically designed for a perfect fit on the AC Infinity 4" Duct Premium Carbon Filter. While it may fit other 4" filters, we cannot guarantee compatibility or performance.

Can I put the pre-filter in the dryer?+

To preserve the material's integrity and elasticity, we recommend air-drying the pre-filter cloth after machine washing on a gentle cycle.

How do I install the pre-filter?+

Installation is simple. Just stretch the elastic opening of the cloth cover over the body of your carbon filter until it is smooth and secure.

Why is using a pre-filter important?+

A pre-filter acts as the first line of defense, capturing larger particles like dust, pet hair, and pollen. This prevents the inner activated carbon from becoming clogged, extending its lifespan and maintaining its effectiveness at odor elimination. For more details on air filtration, check out our in-depth guide on AC Infinity filter kits.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

Most orders are processed within 24-48 hours after being placed.

Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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