You run a tight ship at home, from floor to ceiling -- and everywhere in between. Unfortunately, ordinary home non-electrostatic air filters aren’t super effective at capturing unwanted particles. GOOD NEWS: The unique design of the electrostatically charged Filtrete Basic Dust Air Filter attracts -- and trap --more particles from your air through your heating and cooling system, making quality control a breeze. With each cycle through the filter, your indoor air becomes a little bit cleaner. Filtrete Brand is the #1 most recommended brand of HVAC Air Filters based on the US Filtrete Brand Health Tracker, Ipsos, June 2022 ATTRACTS AND CAPTURES large particles such as lint, household dust and dust mite debris MPR 300 has a rating of MERV 5 FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1-in filters DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through The higher the MPR, the more microparticles - such as pollen, pet dander and smoke - your filter will capture from the air passing through it Series Name: 300 MPR Basic Dust & Lint Actual Length (Inches): 19.719 Actual Thickness (Inches): 0.844 Actual Width (Inches): 11.719 Common Length (Inches): 20 Common Size (W x L x T): 12 x 20 x 1 Common Thickness (Inches): 1 Common Width (Inches): 12 Air Filter Longevity (Months): 3 Captures Bacteria: No Captures Debris and Lint: Yes Captures Dust Mite Debris: Yes Captures Household Dust: Yes Captures Mold Spores: No Captures Particles that Carry Odor: No Captures Particles that Carry Viruses: No Captures Pet Dander: No Captures Pollen: No Captures Smog: No Captures Smoke: No Commercial/Residential: Residential E1 Rating (Percentage): 12 E2 Rating (Percentage): 38 E3 Rating (Percentage): 34 Filter Efficiency (Percentage): 34 Filter Type: Electrostatic Material: Synthetic MERV Rating: 5 MPR Rating: 300 Package Quantity: 3 Subscription Eligible: Yes Warranty: Limited lifetime Washable: No App Compatibility: Yes Bluetooth Compatibility: No Smart Compatible: No Wi-Fi Compatibility: No Works with Air Conditioners: Yes Works with Android: Yes Works with iOS: Yes CA Residents: Prop 65 Warning(s): No UNSPSC: 40101700