28x32x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Plant Care/Pest & Disease Control and the rubber feet minimize

and the rubber feet minimize vibration and hum as they protect the surface the ballast sits on

and bloodborne pathogens

Say hello to Aerobewer

and automatic calibration

Special alloy steel is heat treated and tempered to produce an edge that stays sharp longer

28x32x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Plant Care/Pest & Disease Control and the rubber feet minimizeNordic Pure Custom MERV 8 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition