The Dryer Vent 'Secret' Leak
Impact
Medium
Difficulty
Easy
Speed
Instant
You've sealed your doors and windows, but have you looked behind the dryer? The hole where your dryer vent goes through the wall is often a giant, unsealed gap to the outside.
During the winter, cold air can rush through that gap and into your laundry room, cooling down your whole house. Even worse, if the vent's external flapper is stuck open with lint, you have a direct connection to the elements. Use a bit of expanding foam or caulk to seal the space between the vent pipe and the wall. Then, go outside and make sure the flapper closes tightly when the dryer isn't running.
It's a tiny detail that most people miss, but it's part of a 'death by a thousand cuts' energy strategy. Sealing these 'penetrations' (pipes, wires, vents) is the difference between a house that feels solid and one that feels like a sieve. It's a 10-minute fix that makes a permanent difference in your comfort. Go on, check behind the dryer—there might be some lost change and a lot of lost energy back there!