15x23x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack growing-accessories the top and bottom sides

the top and bottom sides feature flanges that are curved back not only for added strength

safe and reliable

optical physicists

flat surface making them perfect for writing on

- 1000w super HPS

15x23x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack growing-accessories the top and bottom sidesNordic Pure Custom MERV 8 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