Save on Your Energy Bill
To save on your energy bill, find the leaks in your house. Here’s how the DOE recommends you do it:
On a cool, windy day, turn off your furnace, shut all the windows and doors, and turn on all your exhaust fans--including the ones in the bathrooms and your range hood in the kitchen.
This will slightly depressurize your house and increase the airflow between the inside and outside.
Then, light a stick of incense and move it over surfaces that might be a problem: along baseboards, around windows and doors, and along the sill plate in the basement.
If there's an air leak, the smoke from the incense will either be drawn away or blown back into the room.