12_3/4x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Bulbs Hold function locks in measured

Hold function locks in measured value

• Also used on greenhouse ornamentals

The slim form factor allows for greenhouse deployment or high bay indoor installations

Ducting Size: 12” | Length: 8 feet | Includes two stainless steel 12" duct clamps

Premium German aluminum hammertone interior: 99

12_3/4x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Bulbs Hold function locks in measuredNordic 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