17x25x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack ventilation/air-conditioning 3% Calcium and 1% Magnesium

3% Calcium and 1% Magnesium in a highly available form

2 LPH Oil (N/A Water) Flow Rate

Large Multi-level LCD– The LCD is 29 mm (1

Total Grow Control Eden LT Environmental Control System

Its message center provides feedback

17x25x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack ventilation/air-conditioning 3% Calcium and 1% MagnesiumNordic Pure Custom MERV 7 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