28x34x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack cleanroom each has two swivel points

each has two swivel points on either side so that you can have it properly sitting level

For a more detailed listing and crop/pest specific application rates please refer to the manufacturer's label under the DOCS tab

The user can choose to have different day and night temperature settings which will be automatically switched to the correct mode by the built-in photocell

which is one of its key advantages over some competing products

28x34x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack cleanroom each has two swivel pointsNordic 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