Below you’ll find answers to your most common air filtration questions. Plus, a list of terms and abbreviations commonly used throughout the air filtration industry.
Air filters can be found inside the heating/cooling system or inside the return grills in your home. These return grills might be on the ceiling or on a wall.
Away from your body, inward toward your HVAC unit.
Once you find the ‘air flow’ arrow on your new air filter, install the filter ensuring the arrow ALWAYS faces toward the furnace and away from the return duct that carries the air that needs to be heated or cooled into the unit.
Every 30-90 days.
Disposable Panel filters, including our Select Series filters, should be changed every 30 days depending on your environment. Disposable Pleated filters, including our Prime Series filters, should be changed every 90 days depending on your environment. High-traffic areas, pets or smoke in your environment, fireplaces, etc. will require more frequent change-outs to ensure the highest air quality possible.
If there is an existing air filter in your return, the size can be found on the frame of that filter. Look for the measurements in this order: Length (L) x Width (W) x Depth (D).
If your return is empty, you can figure out what size air filter you need by measuring the opening of your HVAC return. First measure length and width, then measure depth. Put your measurements together and they read as LxWxD. Reference this measurement when placing your order for air filters and our customer service team will help ensure you get the right size filters for your unit(s).
Actual size is a filter’s true dimensions. For example: 19.5” x 19.5” x 1.5”. Nominal size indicates that the actual measurements have been rounded and is most often used by manufacturers. For example, the nominal size of our actual filter mentioned above would be 20” x 20” x 2”.
You should remove any plastic or wrapping from the filter – but do not remove its cardboard frame. Find your airflow arrow and make sure it points toward the AC/heating blower. Insert your filter into its slot. If your filter is pleated, make sure your pleats are running vertically where possible.
No. The media in our pleated filters, including the Prime Series, is not waterproof. If the media and/or filter becomes wet, the frame may warp, and the media may sag. There is also a potential for mold growth due to build-up in the filter. If you discover your air filter is damp or wet, you should change it immediately.