28x34x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack LED Lighting Refer to the label for

Refer to the label for dosage recommendations

built-in speed controller

suitable for applications which require proportional dosing

Featuring thermal control and high airflow fans

28x34x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack LED Lighting Refer to the label forNordic 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