16_1/2x21_5/8x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl-athena Introducing Flowers in the Vegetative

Introducing Flowers in the Vegetative stage will ensure a robust product down the road

The silver "plus" coating attenuates the effects of large scale grows above 10

parsley and celery seeds

This line of time-tested activated carbon air filters sets the standard for long life

or 30 minutes

16_1/2x21_5/8x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl-athena Introducing Flowers in the VegetativeNordic 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