23_3/4x23_3/4x1Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Monterey Neem Oil The inline variable speed controller

The inline variable speed controller can control the fan’s speed and turn it on or off

Includes 125W 6400K compact fluorescent lamp

Adjust the pH as needed

and natural resistance to environmental stress

• Maximum free flow air movement

23_3/4x23_3/4x1Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Monterey Neem Oil The inline variable speed controllerNordic 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