12.5x21x0.75 Exact Size Air Filter DUCTWORK The Airbox 1 carbon filter

The Airbox 1 carbon filter has 4" flanges and a CFM of 500

when iron deficiency is present

andersoni should not be used to control a thrips infestation

CO2 enrichment or A/C units while vents are active

Calyx Magnum can be applied to all crops including hydroponics

12.5x21x0.75 Exact Size Air Filter DUCTWORK The Airbox 1 carbon filterNordic Pure Custom MERV 10 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