Filtrete Smart 16x25x1, MERV 12, Allergen, Bacteria Virus HVAC Air and Furnace Filter, 1500 MPR, 1 FilterThe Filtrete Smart Allergen, Bacteria & Virus Air Filter attracts and captures microscopic particles like bacteria, particles that can carry viruses, and large particles like mold spores and pollen. Its Bluetooth-enabled sensor pairs with the Filtrete Smart App to help track filter life and determine optimal time for replacement based on your homes HVAC systems usage. According to the EPA, dirt and neglect are the top causes of heating & cooling system (HVAC) inefficiency and failure (https://www.energystar.gov/sites/default/files/asset/document/HeatingCoolingGuide%20FINAL_9-4-09_0.pdf). To ensure efficient system operation, its important to perform routine maintenance, including filter replacement.#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)Bluetooth-ENABLED SENSOR to track filter life based on data from your homes HVAC system. Track the life of your filter based on air flow and usage not just time. So you never have to worry about change your filter too early or too lateOPTIMIZE FILTER CHANGES for proper HVAC system maintenance. Receive alerts directly to your smartphone when its time to replace your air filterFILTER SIZE & TYPE, access information in the app to remind you of your specific filter types & sizesREPLACEMENT MADE EASY, shop by filter size in the app, chose your preferred retailer, and have it shipped directly to your homeOUTDOOR WEATHER & AIR QUALITY, see outdoor air quality information for your neighborhood and other chosen locationsFiltrete SMART APP is available on iOS and AndriodATTRACTS AND CAPTURES microscopic particles such as smoke, cough and sneeze debris, bacteria and virusesand large particles, including lint, household dust and pollen54% 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)MPR 1500 has a rating of MERV 12CERTIFIED as asthma & allergy friendly (As outlined in report ASCR: 1251-01)FOR RESIDENTIAL use only