16x26x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack MH a battery symbol appears on

a battery symbol appears on the LCD to advise the user that only a few hours of working time is left

Scientifically formulated for superior plant nutrition

Start by pre-mixing the product with a small amount of water and gradually mix in more water until the desired dilution rate is attained

The high-airflow duct filter is designed to use activated carbon to eliminate odors and chemicals

16x26x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack MH a battery symbol appears onNordic 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