16x22_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Extension The extra large hopper makes

The extra large hopper makes consistent feeding of the machine easier

These field tests were conducted to verify the most effective spectrum for the vegetative stage of plant growth

Zenport QZ413 is a multi-use tool that is great for the professional & hobby gardener alike

Work confidently with an attached hood and boots that provide more complete body protection

16x22_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Extension The extra large hopper makesNordic Pure Custom MERV 8 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