Sentences with phrase «old gas furnaces»
The old gas furnace forced air system is retained for now to cover times when there is not enough solar heat.
http://www.builditsolar.com/ Not exact matches
The researchers found replacing old oil - burning furnaces for residential heating with new natural - gas - burning models yielded emissions savings of up to 48 percent.
Photo used courtesy of Vagawi The U.S. Department of Energy has established that in many cases using an electric space heater in one room is much more efficient that heating an entire home efficiently with a gas furnace (especially an older unit).
The average life expectancy for a gas or oil - fired furnace is 15 years to 20 years, according to This Old House, and an aging, inefficient model could be inflating your energy bill.
* Pulled out the big old - oil furnace that looked like an octopus and installed a high efficiency gas furnace.