20x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Light Fixture How does it work

How does it work

TRASH REDUCTION

In independent testing by Utah State University Crop Physiology Laboratory the spectrums of the Philips 315W CMH 3100K Agro and 4200K 942 lamps are ideal for all plant species

dense canopy development and massive root systems

20x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Light Fixture How does it workNordic 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