Duct Sealing Video, Do-it-Yourself Energy Savings

Learn how to properly and effectively seal the heating ducts in your home.

by Don Ames

duct sealing

Sealing heating ducts is the most cost effective measure you can do to your home to save energy and reduce your heating & cooling expenses. When conditioned air leaks out of the duct system before it reaches the inside of our home, inefficiency increases and so does our power bill.

Special tools are now available to the home energy auditor that can test the amount of air leakage associated with the ducts system. By performing a duct leakage test before air sealing and after air sealing, the effectiveness of the work can precisely be recorded.

In the past, ducts were often connected together and sealed with duct tape. Over time, duct tape looses the ability to do the job. The tape drys out, gets brittle and falls off. A new product for sealing ducts has been developed. It is a paste that goes on wet and smooth and dries to a hard consistent finish. The mastic can be applied by hand and forced into every little leaking hole, seam, and connection.

Power companies and Universities have worked together to establish duct testing methods and duct sealing procedures. Multiple test indicate that duct air sealing is one of the most cost-effective measures you can do to your home that will result in noticeable energy savings.

Duct testing and sealing includes both the supply ducts and the return air ducts. In many parts of the country, return air ducts are in the attic space and supply ducts are under the floor. During times of furnace operation, air can be sucked into the ducts from one or both spaces. Generally speaking, the air in the attic and under the floor is not the best air to be pumping into the house.

By sealing the ducts, the infiltration of poor quality air is reduced and the escape of conditioned air is reduced. The result is better quality air, energy conservation and lower power bills.

The University of Washington has been leader in energy conservation methods. The video below is one of the best I have seen concerning duct sealing.

If the player does not play for you, try this link,  http://www.youtube.com/watch?v=Jv4XtnRjgas