21_1/4x23_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack environmental-controllers creating a more breathable garment

creating a more breathable garment that helps prevent heat stress

【Mean Well Driver】240W Mean Well driver helps achieve high PAR output and longer lifespan

Increases resistance to environmental stress

* Chamber: 16*14

it is recommended by top horticultural experts and ideal for a wide range of plants

21_1/4x23_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack environmental-controllers creating a more breathable garmentNordic 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