17_1/2x17_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack commercial-lighting-fixtures - Includes 8 foot pre-wired

- Includes 8 foot pre-wired 120V cord

Using blackout poly on your greenhouse is found to result in improved production and increased plant yield that comes from growing year-round regardless of weather conditions

Highly flexible and compressible

When manual mode is activated

This nutrient rich

17_1/2x17_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack commercial-lighting-fixtures - Includes 8 foot pre-wiredNordic Pure Custom MERV 7 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