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New Member
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Nov 4, 2008, 03:52 PM
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80% eff furnace
Can I convert an 80% eff furnace to a 100% eff? I have an older furnace that I want to put in a house but the house has no chimney. Any suggestions?
Thanks
Jeff
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Heating & Air Conditioning Expert
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Nov 4, 2008, 03:56 PM
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Can I convert an 80% eff furnace to a 100% eff
No
Add a chimney or buy a 90+ furnace
By the time you spend all the $$$ necessary to make the 80+ work with a side vent you can just get a higher efficiency furnace.
I would mention that some 80 % models can be side vented or use B vent for a chimney.
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Plumbing Expert
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Nov 4, 2008, 04:05 PM
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Originally Posted by jhatten
Can I convert an 80% eff furnace to a 100% eff? I have an older furnace that I want to put in a house but the house has no chimney. Any suggestions?
Thanks
Jeff
First off there is no such thing as a 100 percent efficient furnace.
Second, no you can not make your current furnace more efficient. (at least not by large amounts)
But I believe your questions is, can you side vent an eighty percent furnace. Need to either look in your factory supplied owners manual, or contact the manufacturer of the furnace and ask their advice.
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Senior Member
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Nov 4, 2008, 05:00 PM
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Man, if you could make a 100% efficient furnace, you wouldn't have to work another day in your life! :p
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Heating & Air Conditioning Expert
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Nov 4, 2008, 05:49 PM
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Note: Electric furnaces are 100% efficient.
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Senior Member
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Nov 5, 2008, 09:44 AM
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Originally Posted by hvac1000
Note: Electric furnaces are 100% efficient.
Not if you take the efficiency of the power generation and transmission process into account. Then they are much lower than the 80% furnace in your house. I was implying a COMBUSTION furnace. Even power plants can't convert 100% of the heat energy in the fuel to electricity, and they are designed for maximum efficiency.
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Heating & Air Conditioning Expert
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Nov 5, 2008, 10:58 AM
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I understand that. You just said 100% furnace and the electric furnace is 100% efficient. Just having some fun LOL.
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Uber Member
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Nov 5, 2008, 11:50 AM
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Yea, HVAC1000 didn't say where the heat went along the way, but electricity is 100% efficient in converting to heat whether it be the transmissions lines, the heating element or the connections.
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Heating & Air Conditioning Expert
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Nov 5, 2008, 11:54 AM
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How true. Strait electric heat is also expensive except at my second home in Indiana. Strait electric is cheaper than propane in Indiana.
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Senior Member
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Nov 5, 2008, 06:41 PM
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That's because everything is better in Hoosier-ville :)
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Senior Member
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Nov 5, 2008, 08:44 PM
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It's called Lake Michigan
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Senior Member
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Nov 6, 2008, 04:03 PM
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hvac1000,
No insult taken. Just should have defined my terms better in the first place. :-)
EPM
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Plumbing Expert
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Nov 6, 2008, 04:13 PM
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Just to add my input. The way I see it, if there were such a thing as "100 percent efficient anything" then it wouldn't cost you a dime to run it. Maybe 99.9 percent, but 100 percent. I have a hard time grasping that. There will always be a fraction of a percent of heat loss though the wires, even in the furnace itself.
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Heating & Air Conditioning Expert
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Nov 6, 2008, 04:19 PM
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No insult was intended. It was a joke that had been played on me many years ago also. I also believe nothing is 100% efficient if you go back far enough in the supply chain. Power plants are not 100% efficient not even a nuke model.
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Plumbing Expert
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Nov 6, 2008, 04:24 PM
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I do believe we have gotton off course, and are now debating amongst ourselves. Haven't seen a reply from jhatten for some time. Yet here I am adding another post. Weird. Good times. Lol
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Heating & Air Conditioning Expert
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Nov 6, 2008, 04:35 PM
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Many questions are asked and answers given but never a reply from the poster. Usually it is always a strange question and many are from students looking for help with homework. LOL
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Plumbing Expert
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Nov 6, 2008, 04:49 PM
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I understand. But why are we still here? Im here because I enjoy chatting with you folks.
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Heating & Air Conditioning Expert
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Nov 6, 2008, 04:52 PM
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Same here.
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Plumbing Expert
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Nov 6, 2008, 05:20 PM
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Hvac, are you familiar with NDSCS. North dakota state college of science?
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