13x21_3/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack loose coco In most climates

In most climates

The unit is totally corrosion resistant and requires no maintenance

25"L x 6"D

2mm Oil Intake Hole Size would be the best route

Can be purchased separately

13x21_3/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack loose coco In most climatesNordic Pure Custom MERV 8 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