17_1/2x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack bio-organic fertilizer The HI10530 electrode features a

The HI10530 electrode features a built-in microchip that stores sensor type

the alarm configuration is switchable from a normally-closed to a normally-open state or turned off during maintenance

It has reached these remarkable concentrations while still remaining a 100% soluble liquid and surpasses even the closest competition

BotryStop WP is the biological fungicide that works with nature — not against it — to outcompete gray mold

• Cooling fins for maximum heat dissipation

17_1/2x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack bio-organic fertilizer The HI10530 electrode features aNordic 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