Genuine Honeywell FC100A1037 HVAC Replacement Air Filter 20x25x4 Merv 11- 2 PACK

Air FilterProduct Features:MERV 12 rating-up to 60x more efficient than typical 1′ fiber glass filter.Easily fits Aprilaire/Space-Gard models 2200 & 2253Captures high percentage of house hold airborne particles, including microscopic particles you can’t seeExceeds Honeywell FC100A1037 specificationsHoneywell Air Filter Ultra EfficiencyAir Filter Ultra EfficiencyIt’s no secret that today’s tightly-built homes trap dust, allergens and many more potentially hazardous contaminates. It’s also none too surprising that poor indoor air quality ranks among the top five environmental risks to public health.Honeywell Air Filters are significantly more effective and efficient than standard one-inch fiberglass filters, plus they have the added ability of lasting up to one year! They’re also incredibly easy to install and come in accommodating sizes that fit all Honeywell and many of Aprilaire, Space-Gard and Trion Air Bear models.Be certain to measure the filters you are replacing or your filter boot to make sure it’s an exact match. Establish an unrivaled breathing experience for you and your loved ones with Honeywell and their second to none series of Filters.MERV RatingMERV = ‘Minimum Efficiency Reporting Value’ this is used to rate the overall effectiveness of an Air Filter. Below you will find a table that measures the MERV strength and tells you the Application of each unit’s effectiveness. In general an Air Filter with a higher MERV Rating is more effective and has a broader application, but most residential homes will find the best use from an air filter between the 5-12 MERV rating.Fresh, Clean AirHoneywell Air Filter Ultra EfficiencyAbout HoneywellHoneywell’s roots reach to 1885, when an inventor named Albert Butz patented the furnace regulator and alarm. He formed the Butz Thermo-Electric Regulator Co., Minneapolis, in April, 1886, and soon invented a device he called the “damper flapper” – an ingenious predecessor to the modern thermostat.Here’s how it worked. When a room cooled below a predetermined temperature, a thermostat closed the circuit and energized an armature. This pulled the stop from the motor gears, allowing a crank attached to the main motor shaft to turn one-half revolution. A chain connected to the crank opened the furnace’s air damper to let in air. This made the fire burn hotter. When the temperature rose to the preset level, the thermostat signaled the motor to turn another half revolution, closing the damper and damping the fire. The temperature correction was automatic. Over the years, many Honeywell products have been based upon similar, but more complicated closed-loop systems.