20x23x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack additives Integra Boost 37mm ROUND 62%

Integra Boost 37mm ROUND 62% PACK - NO OVER WRAP OR HIC CARDS INCLUDED (Case of 3500)

Increase porosity in growing media allowing more air flow and drainage

Because they retreat to secluded areas to die

Max Bulb Temperature (

and upgraded aluminum cooling heat sinks

20x23x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack additives Integra Boost 37mm ROUND 62%Nordic 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