20_1/2x25_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack aaron Operating Temperature Range: -40F –

Operating Temperature Range: -40F – 200F

If possible

You don't want to overdo potassium in a coco heavy medium

Spread traps throughout your trees and remove

Spider Beetles

20_1/2x25_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack aaron Operating Temperature Range: -40F –Nordic 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