13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack rockwool Proprietary formulation that offers superior

Proprietary formulation that offers superior pH control

The Hydro-x allows separate Day and Night settings for each of up to (4) TS  modules

The Grow1 Inline Garden Water Filter features an inline

Max-Fan™675 168

13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack rockwool Proprietary formulation that offers superiorNordic 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