20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Lamps Insulative design helps maintain desired

Insulative design helps maintain desired grow room temperatures

using modern automated fertigation methods

*SuffOil may remove the glaucous (blue) bloom from evergreens such as Colorado Blue Spruce and Koster Spruce

The active ingredient in Thymox Control Organic (thyme oil) has no known resistance

the increased PAR output of the Lucalox™ PSL lamp best simulates natural daylight to maintain plant growth under artificial lighting conditions

20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Lamps Insulative design helps maintain desiredNordic Pure Custom MERV 14 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