A home heating system is a major piece of equipment that is permanently installed to deliver warmth to an inside area through intermediary fluid movement, which may be air, steam, or hot water. The most common energy source for modern heating systems in the United States is natural gas. Other energy sources are liquefied petroleum gas, fuel oil, coal, or wood.
The State Bond Commission recently approved $5 million for a plan to offer refunds of up to $500 for homeowners who replace their furnaces with more efficient models. The furnace rebate program is authorized under energy legislation Governor Rell signed into law in 2007. The furnace rebate program is for homes and apartment buildings containing four furnaces or fewer. A replacement Furnace in Clinton powered by natural gas has be Energy Star-rated. Furnaces that use oil and propane have to be 84 percent efficient as a minimum. The annual income of the homeowner also factors into the amount of the rebates.
Modern high-efficiency heating systems can be 98 percent effective and function without a chimney. Fuel productivity in a gas heating system is measured in Annual Fuel Utilization Efficiency (AFUE). High efficiency furnaces typically deliver a 25 to 35 percent fuel savings over a 60 percent AFUE furnace. Combustion furnaces always need to be vented to the outside. In the past, this was through a brick or masonry chimney, which usually expels hot fumes with the exhaust. Newer furnaces employ metallic pipes to transport vapors up through the rooftop. These metallic cylinders were called “double-walled” flue pipes. This type of cylinder was used to hold hot fumes within the venting system and safeguard the adjoining assembly.
Residential furnaces can be separated into four broad groups based on productivity and build. The first type is gravity fed, atmospheric burner furnaces. The next type is the forced-air, heat exchanger. Another type of heating system is the forced-draft, mid-efficiency heating system with a steel heat exchanger and multi-speed blower. The final type of heating system is the high-efficiency, or condensing furnace. High efficiency heating systems can reach from 89 to 98 percent fuel productivity.