Standard Size Filters will follow industry standard and be 3/8″ undercut, i.e. a 12 x 20 will measure 11 5/8″ x 19 5/8″. The width of the frames are 7/16″, 7/8″, and 1 ¾” for ½”, 1″, and 2″ filters, respectively. Flexible frames are approximately 3/8″ thick at the edges and 5/8″‘ thick at the center. Note: 1/2″ flexible frame filters are only available in 88% arrestance.
Custom sizes are also available, please specify the EXACT dimension that you want the FILTER FRAME to ACTUALLY measure. Custom Size filters are NOT undercut.
All electrostatic air filters have an 1/8″ overall tolerance. This means the thickness of the frame could vary by as much as 1/8″.
Arrestance is just a fancy word for filtering capacity. All Air-Care filters come in one of two types of arrestance – either 94% or 88%. The 94% arrestance filter provides higher filtering capacity by trapping up to 94% of particles in the air. We also offer filters with an 88% arrestance. This provides slightly less filtering capacity, but is less restrictive, allowing greater airflow through the filter. An 88% arrestance filter would be appropriate using the following formula. If the filter square footage is less than the tonnage of the unit, we recommend an 88% arrestance filter.
Here’s an example: If you have a 16×25 filter and a 2.5-ton unit, the square footage of the filter is 2.8 SQ feet (16 x 25 / 144 = 2.8). Since 2.8 is greater than 2.5, you are fine with using a 94% arrestance filter in this system. If the filter size is 12×18, the square footage of this filter is 1.5 (12 x 18 / 144 = 1.5). Since 1.5 is less than 2.5, we would recommend an 88% arrestance filter in this case. All 94% filters and the flexible frame 88% filters contain an EPA registered anti-microbial material to inhibit the mold and bacteria growth on the filter surface.
Every filter we manufacture is either a standard size or a custom size. The length and width for a standard size air filter is undercut by 3/8″ to accommodate standard size openings. This is consistent with other filter manufacturers. For example, if you are replacing a 25″ x 25″ disposable filter, then you need a standard size 25″ x 25″ electrostatic air filter. The actual size of this filter is actually 24 5/8″ x 24 5/8″.
A custom size filter, however, is cut to the exact sizes you specify. So a custom size 25″ x 25″ filter will be exactly 25″ x 25″ – there is no undercut. The difference is very important – so if you have questions, please contact us.
AC Filter is closed to the public.
To place orders please do so online or by calling 800.322.9919.
All orders must be shipped, Will Call/Pickup is not available.
