Frequently Asked Questions

Pleated filters should be changed at least once every 3 months.

Carbon filters should be changed at least once every 3 months.

Austin Air filters can last up to 5 years.

Metal filters should be washed monthly.

If you have a whole-house air cleaner, please check your model for details.

Because the filter media is denser, your system will have to work harder to pull the air through a higher MERV rated filter. Higher MERV filters may not be appropriate for weak systems - very old ones, or ones which are too small for the house. Your bill may be higher due to the unit running longer, or you may not get the airflow and cooling you want.  

Polyester and fiberglass throwaway filters are becoming less common as more and more organizations realize that low-MERV filters are inadequate for protecting people from harmful air contaminants which can cause or exacerbate health conditions. Many organizations now recommend a minimum of MERV 8 for homes, schools, and offices.

If you have a special situation where lower resistance or extra airflow is required, please contact us for more information. 

For more detail, check out this answer from the Lawrence Berkeley National Laboratory.  

Most of them are! All products by Airflow Products and Austin Air are made in the USA. Look for the Made in the USA sticker on the product's page. 

Option 1: If you look at your old filter, the dimensions and/or part number are likely printed on the frame.

Option 2: Measure the inside of the opening of your return where the filter goes. This is the size filter you need.

We stock many odd sizes, and if we don't have it, we'd be happy to make it for you! Please contact us for pricing. 

The size printed on the filter is the size of the return opening it goes in. The filter itself needs to be slightly smaller than the return frame so that it will fit easily.  

We will send you an email with tracking information.  

If you are a business customer, please contact us.