This episode has many tips for making your home more energy efficient. First, general contractor Tom Silva shows several different ways to seal the openings around doors, windows, and other penetrations in the shell of a house. Next, plumbing and heating expert Richard Trethewey helps a homeowner reduce his heating costs by installing a weather-responsive control on his boiler. Then, landscape contractor Roger Cook shares some tips on reducing energy costs. Finally, Tom helps a homeowner keep things cool with a whole house fan.