Furnace filters now offered in six different sizes for a tighter sealed

January 23, 2007 (Press Release) -- Pure Air offers six different sized filters for a tighter sealed fit. This means that as the furnace air filter loads up, all the air is forced to go through the filter instead of around the air filter. These furnace air filters offer a 20% plus ASHRAE efficiency with a high dust holding capacity (330 grams) with high air flow and low resistance or pressure drop even when fully loaded. Pure Air also provides information to distinguish the overall efficiencies of the most commonly used furnace air filters. These comparisons are based on performance tests by CSA & ASHRAE, both compare to HEPA air filters which remove particles at 0.3 microns in size.