#1 Recommended Brand* (*Filtrete Brand is the most recommended brand of HVAC Air Filters based on the US Filtrete Brand Health Tracker, Ipsos, June 2022) | The higher the MPR, the more microparticles--such as pollen, pet dander, smoke, bacteria and viruses--your filter will capture from the air passing through it | FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1 inch filters, and at least every 12 months for 4 inch and 5 inch filters | A dirty filter will slow down air flow and make the system work harder to keep you warm or cool--wasting energy; Sign-up for a filter change reminder program that works for you! | Enabled with Dash Replenishment; If you use this feature, the sensor in the device will track the life of your filters and will automatically place an order for new filters from here when it's time for a replacement | OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 inch home air filters for your furnace, air conditioner or HVAC system | DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through | ATTRACTS AND CAPTURES microscopic particles such as smoke, cough and sneeze debris, bacteria and viruses--and large particles, including lint, household dust and pollen | 54% SMALL PARTICLE CAPTURE, like bacteria and particles that carry viruses* (* % captured is based on ASHRAE 52.2 testing for 0.3 to 1 micron particles from the air passing through the filter, which relates to HVAC industry standard efficiency testing) | CERTIFIED as asthma & allergy friendly* (*As outlined in report ASCR: 1246-01) | Designed with Filtrete Brand 3-in-1 technology from 3M to pull in and trap unwanted air particles while letting clean air flow through | Captures microscopic particles including: smoke, cough/sneeze debris, bacteria, viruses, and large particles like lint, dust and pollen. | Electrostatic air filter with Microparticle Performance Rating 1500 | 3 times better at small particle capture compared to non-electrostatic pleated filters for the capture of 0.3 to 1.0 micron particles. | Lasts up to 3 months