17x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack microbial fertilizer Exclusive Lock & Seal BAREF

Exclusive Lock & Seal BAREF lamp cord installed

500K 46½” x 3⅛” x 1⅝” 1

and permits 90% light transmission

5 million - 1

The doorways and wraparound zippers offer 360 degree convenient access

17x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack microbial fertilizer Exclusive Lock & Seal BAREFNordic 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