Custom Air Filters Near You Across the United States

What Air Filter Size Do I Need?

Regardless of the air filter or furnace filter size you need, we have them in stock and ready to ship. Use the following size selector by selecting your filter's dimensions: width (long side), depth(short side) and thickness. You can also scroll down and use the Air Filter Sizes chart to pick the right size and quickly checkout.

Looking for high-quality custom-made air filters near you for your home or business? Whether you're in a hot, dry, or humid climate, our custom air filters are designed to improve air quality and HVAC system efficiency. From AC filters to furnace filters and HVAC filters, we offer tailored solutions that fit your needs in various states across the country.

Explore our state-specific solutions below and find the perfect custom furnace filter near your location:

How do I measure the dimensions of my air filter?

To find the right size air filter, check the current filter’s frame for printed dimensions. If they’re not visible, use a tape measure to record the length, width, and depth in inches.

Always measure the exact dimensions, then round up to the nearest whole number if needed—standard filters are often labeled with nominal sizes (like 16x25x1) that may differ slightly from the actual size.

Accurate measurements ensure a proper fit and optimal airflow in your HVAC system. And if you're searching for custom-made air filters near you, knowing your exact dimensions makes it easy to order filters tailored specifically to your needs.

What MERV rating air filter should I choose?

MERV ratings indicate how well an air filter captures particles. A MERV 8 to 11 air filter is ideal for most homes, balancing clean air and efficient HVAC system performance.

If you have allergies, pets, or live in a high-pollution area, a MERV 11 or MERV 13 filter offers better dust, pollen, and dander filtration. Higher MERV ratings (13+) are best for hospitals or industrial use. Check your system’s specs, as high-MERV filters can reduce airflow in some residential units.

How often should air filters be changed?

Generally, you should replace your air filter every 1 to 3 months, depending on usage, filter type, and environmental factors. Homes with pets, smokers, or allergy sufferers may need more frequent changes, especially during peak heating or cooling seasons. Regular filter replacements help maintain clean air, reduce strain on your HVAC system, and improve energy efficiency.