Questions? We've Got Answers.

Look at the side of the filter you have now. The size is printed on the frame, like 20x25x1 (width x length x depth, in inches). Pick that size on our site. No old filter? Our size guide shows you how to measure.

Filter sizes are rounded. A 20x25x1 filter really measures about 19.5 x 24.5 x 0.75 inches, so it slides into the slot easily. This is normal for every brand, and the real size is shown on each product page.

Over 60 standard sizes in 1, 2 and 4 inch depths. Shop by size to find yours.

Yes. We make custom sizes to your exact measurements. Order a custom filter here.

Yes. Email us at info@filterhome.com with your sizes and how many you need, and we will send you pricing.

MERV is a number that shows how well a filter catches small things in the air. The higher the number, the smaller the bits it can catch.

MERV 8 catches everyday dust and pollen and lets air flow most easily. MERV 11 is right for most homes and also catches pet dander. MERV 13 catches even smaller bits, like smoke, and is a good pick if someone has allergies. The Odor Eliminator has activated carbon to help with smells and smoke. Not sure? Take our 10-second quiz.

Not always. A higher MERV catches more, but air has to push a little harder to get through it. Most home systems do well with MERV 8 to 13. If your system is older or the air feels weak, MERV 8 or 11 is a safe choice.

For a 1-inch filter, about every 2 to 3 months. Every 1 to 2 months if you have pets or allergies, or run the heat or AC a lot. Thicker filters last longer: 4-inch filters can go 6 months or more.

Find the arrow on the side of the frame. Point it toward the furnace or air handler, the same way the air flows.

Right here on Long Island. We make every filter at our shop at 217 Central Ave in Farmingdale, NY.

Pick your size, filter and how often you want a new one: every 1, 2, 3, 6 or 12 months. We ship each filter on that schedule, and you get 10% off every delivery.

Yes. You save 10% on every delivery for as long as you stay subscribed.

You pay for your first order today. After that, you pay each time a filter ships, never ahead of time.

Yes, anytime. There is no minimum and no fee. Log in to your account to make changes, or call, text or email us and we will do it for you.

Yes. Change it from your account, or just tell us and we will update your next delivery.

Yes. Shipping is free on every order, with no minimum.

To all 50 states, Washington D.C., Puerto Rico and military addresses (APO/FPO/DPO). We do not ship outside the U.S. right now.

First we make and pack your order: 1 to 2 business days for standard sizes, 1 to 3 for custom sizes. Then it is on its way: about 1 to 3 business days to New York, New Jersey and Connecticut, 2 to 5 to most other states, 3 to 7 to the West Coast, and 5 to 10 to Alaska, Hawaii, Puerto Rico and military addresses.

We email you a tracking link as soon as your order ships. No tracking email within 3 business days? Email orders@filterhome.com.

Contact us as soon as you can. If the order has not shipped yet, we can fix it. If a package comes back to us, we will reach out to send it again; for an address typed wrong at checkout, the new shipping is paid by you.

Sorry about that. Email orders@filterhome.com within 14 days of delivery with photos of the box and the filter, and we will send a new one at no cost.

Get in touch and we will help you swap it for the right size.

Contact us within 30 days of delivery. If the filter was only test-fitted and not used, we will make a new one with your corrected measurements for free. Send your order number, a photo and the new measurements. Read the custom filter policy.

Contact us first and we will tell you your options. Filters must be unused and in their original packaging, and return shipping for a change of mind is paid by you. Custom-size filters can't be returned for a change of mind.

Check with neighbors and your building first. Still missing? Contact us and we will help you file a claim with the carrier.

We are an air filter maker on Long Island. We make filters at our shop in Farmingdale, NY and ship them straight to your door. Read our story.

Yes. Call or text us at (516) 634-3330, or email info@filterhome.com.

217 Central Ave, Farmingdale, NY 11735, on Long Island.