๐ SpiroPure 11x20x1 MERV 11 Pleated Filter Air Filters - Made in USA (6 Pack) (Find a value pack of high quality replacement furnace filters from SpiroPure. SpiroPure pleated AC & Furnace filters are made in the USA and are the perfect choice for most standard residential and light commercial air conditioner and furnace units. Please measure your existing furnace filter before ordering to ensure that this size will be compatible with your AC & furnace system. MERV 11 rated filters are the perfect efficiency upgrade for homes that contain pets cigarette smoke or other additional pollutants. The 85% or better efficiency of particles sized 3 to 10 microns with the added 65% to 89% of particles sized 1 to 3 microns means that MERV 11 filters are an excellent choice for those who suffer from asthma severe allergies and other respiratory related illnesses. SpiroPure MERV 11 Pleated Filters remove the following household contaminants: Lint & Dust Dust Mite Debris Pollen Mold Spores Pet Dander Auto Emissions Smoke We recommend replacing your furnace filter every 3 to 4 months for maximum efficiency and cooling and heating system life. A dirty filter restricts airflow which can put too much strain on the system. As a result there can be motor burnout and an overheated system. The leading cause for HVAC system failure is a dirty air filter. >
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