10x28x1 (9.5 x 27.5) Accumulair Gold 1-Inch Filter (MERV 8)Our MERV 8 Accumulair filters are excellent in removing pollutants such as bacteria, pollen, mold spores, fine dust, viruses, and pet dander from the airflow in your home or office. The filter media is Electrostatically charged. An electrostatic charge increases the air filter's capacity to capture particles smaller than 1 micron. This means you will breathe much cleaner air with our Accumulair filter. 

The filtering material on our air filters has a high dust-holding capacity.  These filters perform much better than ordinary filters because of their higher efficiency and lower pressure drop.  This allows your furnace or air handler to stay cleaner while operating more efficiently.  A clean and efficient air conditioning and heating system will provide you with lower energy bills.

The air filter media is 100% synthetic, and has varying density for higher dust holding capacity.  The media is bonded to a 30 gauge rust-resistant metal support grid.  In addition, the media will not absorb moisture, or support bacterial growth.  The media is continuously bonded to the filter frame to prevent air bypass. The criss-cross supports are bonded to the pleats to prevent filter collapse and filter bending.

Ordering The Right Size:  Measure your existing filter because the size written on the frame may, or may not be the true size. Depending on the manufacturer, the size on your filter frame could be "Nominal" (by name only) or "Actual" (true size). For example, a 20x24 "Nominal" filter will measure 19 1/2 x 23 1/2. On the other hand, a 20 x 24 "Actual" filter will truly measure 20 x 24.  If you need a "Nominal Size", but order an "Actual Size", the filter you get will not fit properly, and vice-versa.