Apr 28, 2015 · HVAC Air Filter Types. Below are the most common air filters used in air conditioning units, ordered from least effective to most effective for improving indoor air quality. Washable Air Filters. Washable air filters are not recommended for most residential HVAC systems. These filters usually run about $20 and require additional maintenance. Carrier FB4CNF036 filters exist in many different types and sizes, which all depends on your personal demands for clean air and the specific size of filter you need for your system. Professionals in the industry advise the your furnace filter is replaced for a clean one every 90 days or so due to the filter clogging up and restricting the flow ... ...of which air filters accounts for 12%, air filter accounts for 2%. A wide variety of air filter by size options are available to you, such as panel filter There are 472 suppliers who sells air filter by size on Alibaba.com, mainly located in Asia. The top countries of suppliers are Japan, China, and Pakistan...All Categories > Blower/Air Intake Filters Blower/Air Intake Filters Reliable and responsive, Fab-Tex Filtration provides an ever-expanding line of replacement Air Intake filter elements for most OEM equipment such as Dollinger, Consler, Endustra, Gardner-Denver, Shawndra Sparks, Sunshine, IFM and Universal. Explore air quality in your city and around the world. Air quality data, collaboration tools, and technology solutions - powered by IQAir.Better than HEPA-type filters. We make larger filters means they last longer (12 months of continuous use). Designed for room sizes up to 600 sq ft (20' x 30'). Activated Carbon Filter: A stand-alone carbon filter (not a small carbon pre-filter) that you need for air pollution and light odors.