20x23x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack cococube • Flicker-Free steady state operation

• Flicker-Free steady state operation

which eliminates any chance of starting the spiraling process as well as dramatically increases growth rates

Sulfate (SO4)

and not toxic to animals

Chemboys Deionized (DI) water has been filtered and treated to remove virtually all ions and contaminants

20x23x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack cococube • Flicker-Free steady state operationNordic 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