21x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors 3-option preset temperature deadband (2/4/6°F)

3-option preset temperature deadband (2/4/6°F)

How many should I order for a large garden

Replacement ignitors are available in a variety of wattages

Using the BETA-2 in this way provides a VERY economical and efficient way of dealing with heat within an enclosed space

21x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors 3-option preset temperature deadband (2/4/6°F)Nordic Pure Custom MERV 14 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