18x28x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors True to its form the

True to its form the Airis Turboo doubles as a keychain

But CalCarb is an unusual form of calcium carbonate that is highly unstable

The DCC-1 is designed to be used in combination with one of TrolMaster’s plug-in style module

The filter can be used in conjunction with an inline duct fan to act as both intake and exhaust configuration

18x28x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors True to its form theNordic 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