Unfortunately, most furnace filters are slid in place without an airtight seal, which allows air to pass around the filters. This problem is worse for the higher-efficiency MERV filters because of the increase in air resistance.
Common Cause is a network of people working to help rebalance cultural values to create a more equitable, sustainable and democratic society. 1  We are all shaped by our culture.
cause. 1. a person that acts or a thing that occurs so as to produce a specific result: the cause of the accident. 2. the reason or motive for some action: a cause for rejoicing. 3. good or sufficient reason: to complain without cause.