28x32x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack environmental-controllers Available Sizes:

Available Sizes:

always maintain proper conductivity (CF) and pH levels for your crop

• Antibacterial and antifungal properties

the Bubble Magic™Shaker includes the custom-fit bucket and shaker bag

It passed all legislation and is safe to use

28x32x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack environmental-controllers Available Sizes:Nordic Pure Custom MERV 13 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