Create Custom Size HVAC, Air or Furnace Filters

Build your custom air filter for home, commercial or office in four easy steps!

How to measure your filter
StepEnter your filter dimensions (actual) x x
StepSelect your performance rating

Additional Info

Nominal Depth 1”
Actual Depth 3/4”
Nominal Depth 2”
Actual Depth 1 3/4”
Minimum Size
5” x 5”
Maximum Size
40” x 40”

Please Note: Due material limitations used to build a custom filter, we construct a double filter (two filters fused together) when any filter dimension is larger than 24.75” on both sides and or larger than 29.75” on one side. Please allow up to an additional five (5) business days for processing your custom filter order.

Custom filters are not eligible for return or refund.

How to Measure Your Filter

Steps 1 & 2

Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).

Step 3

Measure the thickness (Depth) of your filter from front to back.

Step 4

Put Your measurements together (L x W x D).

Actual Size

A filter’s true dimensions.

Example: 19.75” x 19.75” x 1”

Nominal Size

Rounded numbers used by manufacturers.

Example 20” x 20” x 1”

View Detailed Instructions

What’s the difference between actual and nominal size?

Actual Size

A filter’s true dimensions.

Example: 19.75” x 19.75” x 1”

Nominal Size

Rounded numbers used by manufacturers.

Example 20” x 20” x 1”

Learn More

High-Quality Custom Air Filters Made to Your Exact Specifications

Enhance your indoor air quality with our custom size air filters, meticulously crafted to meet your HVAC system's exact specifications. Whether you're in need of furnace filters, AC filters, or air purifier replacements, our filters ensure a perfect fit for both standard and non-standard sizes, eliminating gaps and maximizing efficiency.​

Key Features:

Tailored Fit: Provide your exact size measurements, and we'll create filters that seamlessly integrate with your cooling system, promoting optimal airflow and system performance.​

Diverse MERV Ratings: Choose from MERV 8, MERV 11, or MERV 13 filters to capture airborne particles like lint, pet dander, mold spores, and other allergens, enhancing your home's indoor air quality.​

Premium Construction: Our pleated filters are built with durable filter media and sturdy filter frames, ensuring longevity and consistent filter performance.​

Made in the USA: Proudly manufactured domestically, our filters exemplify American craftsmanship and quality.​

Prompt Processing: We understand the importance of timely replacements. While custom filter orders are crafted to your exact specifications, we strive for fast delivery, typically shipping within a few business days.​

Invest in our high-quality, durable air filters to protect your HVAC and air systems, ensuring they operate efficiently while safeguarding your living environment from unwanted airborne particles.