21_1/4x21_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack ac-/-dehumidification-/-humidification Curative – 10-25 per 100

Curative – 10-25 per 100 square feet

Celery Worm (aka Parsley Worm

Can be used in conventional or organic growing

Harmless to beneficial insects

more abundant blooms (and who doesn't

21_1/4x21_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack ac-/-dehumidification-/-humidification Curative – 10-25 per 100Nordic 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