Experts say a simple test can save the average household hundreds of dollars a year.
To the naked eye, most homes look air tight. A recent study found however, that this is often not the case. The average home has a number of holes, gaps and cracks through which heat can escape in the winter and cool air escapes in the summer. These leaks can add up and sealing them is a bright way to cut rising energy costs. If the smoke stream travels horizontally, there is a leak.