20x21_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Lamps Fuse Rating: 6A/250V~

Fuse Rating:                                        6A/250V~

tech grade enzymes

Experience ease and simplicity in taking pH

It can be mixed with potting soil

Molds and Bacteria including Staphylococcus aureus

20x21_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Lamps Fuse Rating: 6A/250V~Nordic Pure Custom MERV 12 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