28x32x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack covid-19 Includes: pH 7 & pH

Includes:  pH 7 & pH 4 calibration solution (50ml bottle each)

Indian Meal Moth

Lesser Peach Tree Borer

Lightweight clear anodized aluminum

Once or twice a week

28x32x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack covid-19 Includes: pH 7 & pHNordic Pure Custom MERV 14 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