15x30_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs Manual & Auto Dimming

Manual & Auto Dimming

foundations

The 6in 3 speed Max-Fan™has a built in speed controller Speed 3 334 CFM Speed 2 264 CFM Speed 1 201 CFM Demand the very Best Accept No Imitations

Comes with electrode

Driven by Potassium (derived from potassium sulfate)

15x30_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs Manual & Auto DimmingNordic 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