18x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_bfg Features a super tough

Features a super tough

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and the other ½ dose within the last hour of brew

0% Water Soluble Magnesium

18x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_bfg Features a super toughNordic Pure Custom MERV 7 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