Quote from Tim in Taking Jill for Granite
Heidi: Welcome back to our continuing effort to make Al's place energy efficient. Tim: Thank you, Heidi. We now give you... [fanfare plays] Tim & Al: The board door! Al: Now, a board door is the most effective way to detect air leaks in your home. Tim: It does that by creating a vacuum inside the house, pulling outside air through any cracks and openings. Al: And since you can't see air... Tim: Unless you live in Los Angeles. [chuckles] Oh, that's not pollution, that's a marine layer!