A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic.
High efficiency furnace in attic massachusetts.
These days 95 afue is a common rating among new gas powered furnaces.
So a 95 furnace is more efficient than an 80.
High efficiency furnaces afue starts at 90 and uses blower motor technology used to circulate the warm and cold air in your home.
If you re looking for efficiency you probably want to choose a gas furnace.
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The total drop in efficiency can be up to 35.
It moves the air with a circulating fan.
While the condensing furnace is different in its design and repair needs it does have some similarities to a conventional furnace like a conventional furnace it takes in cold air from the house and runs it through an air filter.
Conventional furnaces use only one they use a two stage process.
Its sleek design allows the system to fit in most closets.
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High efficiency furnaces aren t usually recommended for an attic.
That means you have higher energy costs and less efficiency since you re blowing the air down instead of allowing it to rise naturally.
Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.
The trick to the installation of a gas furnace in an attic space is routing the condensate drain from the attic down through the core of the house to the basement.
This is one of the quietest oil furnaces on the market with so many features that help reduce noise.
And it has a gas burner with electronic ignition although condensing.
There is a common misconception that this is not possible for high efficiency furnaces.
There are rarely instances when we will advise against an attic installation.
How a high efficiency condensing furnace differs.
Two stage unit expect to pay more for a more energy efficient unit or two stage unit.
In the first stage gas is burned to heat the first heat exchanger.
As expected since it s an oil furnace this is not the most energy efficient option out there.
In the second stage the secondary heat exchanger extracts heat out of the hot.
A standard efficiency furnace provides 80 annual fuel utilization efficiency afue.
This uses up less electricity to power the furnace.
With all that said you can generally count on attic placement being a bad idea in part because high efficiency furnaces which dominate the market today just can t function in attic space usually due to both the volume of air necessary for operation and because of safety considerations.
After the first heat exchanger is heated the second stage begins.
In this type of furnace 20 of the energy produced by natural gas is expelled as exhaust.