MERV RATED REPLACEMENT AIR FILTER: AIRx Filters 24x36x1 (Actual: 23.50 x 35.50 x 0.75in) MERV MERV 13 air filter assures the effectiveness of your home HVAC system resulting to efficient heating, ventilation and air conditioning CONTAMINANT REDUCING REPLACEMENT AIR FILTER: AIRx Filters 24x36x1 air filter replacement (Actual: 23.50 x 35.50 x 0.75in) traps 1.0 - 3.0 micron of particles such as lint, dust, pollen, dust mite debris, mold spores, pet dander, smoke, smog, airborne bacteria HIGH QUALITY AIR FILTER REPLACEMENT MATERIAL: AIRx Filters 24x36x1 (Actual: 23.50 x 35.50 x 0.75in) air filters are 100% made in the USA using high quality air filter moisture resistant double-wall beverage board SUPERIOR AIR FILTER REPLACEMENT CONSTRUCTION AND SPECS: AIRx Filters 24x36x1 air filter uses electrostatically charged 100% synthetic gradient media can perform at temperature ranging from 180F (82C) continuous service, peak 225F (107C) MULTI-PACK OEM AIR FILTER REPLACEMENT COMPATIBLE: Purchasing an AIRx Filers is easy, AIRx Filters offers various sizes that would fit your AC and/or Furnace air filter need and different multi-pack to fit every budget.