These variable speeds also provide a quiet, consistent flow of air for enhanced comfort to help eliminate hot/cold spots in your home. These variable speed motors use way less energy than the standard single speed blower motors and increase the furnaces AFUE rating. The term "variable speed" refers to the furnace's indoor blower motor, which moves air at different speeds to precisely control the flow of heated and cooled air throughout your home. Variable speed furnace does not actually refer to the furnace itself it refers to the furnace's blower motor. A two stage furnace costs more initially but will save you costs on your monthly home heating bills. And because the furnace actually slows down, noise is also reduced. This helps to keep your home more comfortable. This allows the furnace to stay on longer while burning way less gas. The furnace has two stages of heat, a smaller size flame for those chilly days and a larger size flame for those really freezing cold days. So with single stage furnaces the furnace is cheaper to buy but your monthly utility bills with be higher to operate this type furnace. Single stage means the furnace will use the same size of flame to produce heat regardless of the temperature outside or inside.
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Also this type of furnace is the least technical, which means it is easy to install and repair making them the most common furnaces. Each dollar spent in turn brings over 98 cents back in heat to your home.
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To get the maximum worth out of each dollar spent on gas, a 98% plus operating furnace is the best option available. Leaking ducts or non insulated ductwork running through a cold attic will increase how much is lost.Ī 80 AFUE rated furnace compared to older furnaces which recover only 45-65 cents worth of heat, these 80 AFUE furnaces are affordable and good choices for your home.
The AFUE rating does not include how much heat energy is lost through the ductwork of the heating system. To be more specific, AFUE is the ratio of annual heat output of the furnace or boiler compared to the total fossil fuel energy consumed by a furnace or boiler in a year.įor example a furnace rated at 98 AFUE means for every dollar you spend to heat your home 98 cents is returned in heat and 2 cents is lost. Furnace Efficiency Rating AFUEĪll of today's modern Furnaces and Boilers efficiency is measured by annual fuel utilization efficiency (AFUE). Let us help you by explaining some of those furnace systems and related terms. You're researching online or have heard talk about variable speed heating, single stage, two stage and modulating gas valves and AFUE ratings. As a homeowner, one of the hardest decisions you'll have to make about your Furnace is when it's time for a new heating system.