15x23x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Commercial Lighting Recommonded spacing is 60" or

Recommonded spacing is 60" or a 5' on center grid pattern

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15x23x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Commercial Lighting Recommonded spacing is 60" orNordic Pure Custom MERV 13 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