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.
Then Reichenbach maintained that there will be a common cause, C, of A and B, satisfying the following conditions: 1  0 < P(C) < 1. 2  P(A & B | C) = P(A | C)P(B | C) 3  P(A & B | ~C) = P(A | ~C)P(B | ~C) 4  P(A | C) > P(A | ~C) 5  P(B | C) > P(B | ~C).