15x18x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_spectrumking The following dosages are the

The following dosages are the best recommendation

each granular

Active ingredients are cellulase

Height: 36"

15x18x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_spectrumking The following dosages are theNordic Pure Custom MERV 14 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