21_1/4x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_hlg The Vortex Powerfan VTA Series

The Vortex Powerfan VTA Series axial in-line fans are ideal to boost airflow

The effect of Bio·Heaven™

Regalia Biofungicide uses similar processes for preventive disease control and suppression

check out the Aviator FX Clip-on

All Sweet flavors are scientifically formulated with carbohydrates

21_1/4x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_hlg The Vortex Powerfan VTA SeriesNordic 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