15x19x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack ac-dehumidification-humidification HIGHLY-CONCENTRATED FORMULA: With a concentration

HIGHLY-CONCENTRATED FORMULA: With a concentration of 900 propagules per gram

The insulated damper uses gravity-fed shutters that close the opening when the whole house fan is not in use

This superior quality coir

Black on one side & White on the other

do not use with timer TM01240

15x19x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack ac-dehumidification-humidification HIGHLY-CONCENTRATED FORMULA: With a concentrationNordic Pure Custom MERV 10 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