15x36x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_hf Available in 6

Available in 6

Also includes two 120 millimeter metal fan guards and a mounting screw set

The BETA-8 features a high-quality remote CO2 sensor (with 16ft cable) and built-in photocell to automatically activate your supplemental CO2 system to maintain CO2 PPM levels only during daylight hours

Grow easy on yourself

compost-based potting soil designed for all your container gardening growing needs

15x36x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_hf Available in 6Nordic 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