18x27x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Fertilizer • Finger indentations offer a

• Finger indentations offer a comfortable

Unaffected by freezing or adverse weather — remains viable through seasonal temperature extremes

Effective area: Up to 600 sq ft at 10' ceiling height or 6000 cu ft

the finest linear lamp-mover available

For highly sensitive and specialty crops

18x27x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Fertilizer • Finger indentations offer aNordic Pure Custom MERV 12 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