21x23_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack pumps-and-irrigation-supplies Accommodates blade storage racks

Accommodates blade storage racks

Zelus renardii is a hardworking ambush predator and excellent addition to any growing area

FULL HUMIDITY CONTROL – The two large top vents are adjustable and give you total control of the humidity levels in the plants’ environment

• 450 CFM fan with 1-6 inch duct for outgoing air (bottom duct)

durable and easy to clean

21x23_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack pumps-and-irrigation-supplies Accommodates blade storage racksNordic Pure Custom MERV 8 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