Have a custom sized furnace air filter that you cannot find for sale anywhere?
No sweat, we keep your air fresh without the stress regardless of your odd filter size!
PureFilters can manufacture your exact filter size and have it shipped to you within 10-15 business days. No furnace filter is too large or too small for size, regardless of your size, we can make it fit your exact needs.
Check If Your Custom Filter Size Is Listed
Before making a request for a custom filter size, be sure to first check our store if your custom furnace filter size is listed. PureFilters has over 900 furnace filter size already listed in our store, including several custom sizes.
You can narrow down your furnace filter by a number of ways in including size, MERV rating and or brand.
If you cannot find your filter size in your store, please proceed to the next steps below.
How To Measure Your Custom Furnace Filter's Size
It's important to know the difference between a nominal size and an actual/exact size which we explain it in detail in our Furnace Filter Size Guide. In order for us to make the correct filter for your needs, it's best that you send us the exact size and NOT the nominal size.
If the exact size is not written on your filter, please measure your filter's height, length and thickness in inches as seen in the image below:
Send in your custom size filter request with the size in inches using the contact form on the right-hand side of this page, in this format:
height x length x thickness (example: 14½ x 26¾ x 2½)
Someone from customer service will get back to you with a quote within 24 hours. From there, if you wish to proceed, we will send you an online payment request, once processed, you can expect your custom size furnace air filters delivered within 10-15 business days.
Make sure that you measure the exact dimensions of our furnace filter.
NOTE: There are no refunds/returns for custom fixed furnace filters. Please measure and confirm your exact filter size before purchasing.