Closing the bedroom door.
It’s something you (and your kids) probably do every day. But it could be ruining your comfort and increasing your energy bills.
To understand, you know how an air conditioning and heating system works.
How an air conditioning & heating system works
Most air conditioning and heating systems in the Dallas, Georgia area are “forced-air systems.”
Here’s how they work:
In a perfectly balanced system, the same amount of air that goes into the heating/cooling system comes out of the system.
Here’s the problem when you close bedroom doors: You’ve created a barrier between the supply side and return side. So instead of that air being recycled into your system, it builds up in your bedroom. As that pressure builds up, the air takes the path of least resistance out of your home, usually through the walls and windows.
As that air exits the house, it must be replaced with more air in the rest of the house since the return duct is still pulling in air.
This causes air to be pulled in through the chimney, bathroom vents, and water heater and furnace flues. (This is known as back drafting.)
The consequences of closed doors
This buildup of pressure causes a variety of problems for you, including:
Note: Only closing a couple doors at a time is unlikely to cause these problems so long as your bedroom doors have a fair-sized (1-3 inches) gap at the bottom of the doors.
How to fix the problem
The obvious solution is to simply keep bedroom doors open all or most of the time (at least when your air conditioner or heater is running).
But this probably isn’t going to fly in your house. People want their privacy, after all. So here are a few other options: