16x26x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films Gro-Blocks are similar to a

Gro-Blocks are similar to a plant container

Faster plant growth Higher harvest yields

• Kills more than 100 listed insects

This sophisticated system modulates the speed of dehumidification based on the precise load conditions of your grow environment

46 kg / 87 lbs

16x26x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films Gro-Blocks are similar to aNordic 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