14x22x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack ventilation • Perfect for Koi ponds

• Perfect for Koi ponds

and temperature measurements all in a single tester

After the first two irrigations you will be in total control of your fertility program

Every material used in its production either meets or exceeds NOP standards

Features dual 120mm PWM-controlled DC fans that are highly efficient in maximizing airflow at lower noise and power levels

14x22x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack ventilation • Perfect for Koi pondsNordic 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