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.
Full Definition of CAUSE. 1. a: a reason for an action or condition: motive b: something that brings about an effect or a result c: a person or thing that is the occasion of an action or state; especially: an agent that brings something about. 2. a: a ground of legal action b: case. 3. : a matter or question to be decided. 4.