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Thread: Furnace

  1. #1

    Confused

    What exactly is your definition of a furnace? I thought a furnace in a residence was only called a furnace when there was a pilot light and the furnace burned gas. Other guys in the trade are calling an electric air handler a furnace. I always called it an air handler, gas or electric. So whats the correct terminology to be using? Also what is the correct terminology for the condensor? Some in the field just say the "compressor". Thank you.

  2. #2
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    A furnace is a heating appliance to me. Electric furnace, gas furnace, oil furnace. Even a Water Furnace

    Many will call an electric furnace an air handler too.

    To me, the outdoor unit is a condensing UNIT or heat pump. A condenser technically doesn't have the compressor, like in the big stuff.

  3. #3
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    A furnace is a heating appliance that heats air.

    Furnaces do NOT heat water. Boilers heat water.

    That drives me as nuts as hot water heaters do to Spotts.

  4. #4
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    So Dave; what do you call a gas fired heating device that heats glycol solution that either heats the air around it in order to blow heated air into a home duct system or to be pumped into a coil in a water tank to heat domestic water?
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  5. #5
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    Originally posted by RoBoTeq
    So Dave; what do you call a gas fired heating device that heats glycol solution that either heats the air around it in order to blow heated air into a home duct system or to be pumped into a coil in a water tank to heat domestic water?

    if it heats a liquid its a boiler.

  6. #6
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    This is like a discussion on religion.

    If the guru of BTU's were to officially claim and decree each and every item, be it a furnace, boiler, heater, etc... These guys would STILL dispute it.

    Use the lingo that communicates your meaning.

    General residential and light commercial conventions are that a furnace is a heating device, often with a blower section to move air across the heating medium. IE: Electric elements, gas fired heat exchanger, water or glycol coil, or even wood fired heat exchanger.

    A boiler is a device that heats water, and the heated water is circulated to remote heating elements such as a stand alone Airhandler (Which - typically is a metal cabinet with a blower for air distribution.) These often contain a heating coil fed from a remote source, may contain an Air conditioning DX coil.

    Sometimes the DX/heating coil is withing the Air handler, or downstream in duct work.

    It all boils down to semantics. No ten-inpunded.

    This thread would outrun the 9mm thread ... and just might, as we all argue the wording - even though we all know what we mean. But it's enevitable. Nice going!
    Teach the apprentices right... and learn from their questions and ideas.

  7. #7
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    Originally posted by t527ed
    Originally posted by RoBoTeq
    So Dave; what do you call a gas fired heating device that heats glycol solution that either heats the air around it in order to blow heated air into a home duct system or to be pumped into a coil in a water tank to heat domestic water?

    if it heats a liquid its a boiler.
    But it also heats air.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  8. #8
    Any central type heating unit.........no........this won't get near the 9mm thread.
    Hey cockroach, don't bug me! ©

    www.AskTheDiceman.com

    www.TheColdConspiracy.com

    www.Pennwood-HVAC.Com

    Bring Em Home....

  9. #9
    A furnace is a device that uses some means of energy to create heat.
    (Electric, Gas, Oil, Wood)

  10. #10
    That being said, there is a difference between an "air handler" and a "electric furnace". Being that the air handler will have provisions for a primary (1st stage) heating coil.

    A true "Electric Furnace" is one that will satisfy the structures requirements on it's own, like a gas fired furnace.

  11. #11
    Originally posted by RoBoTeq
    what do you call a gas fired heating device that heats glycol solution that either heats the air around it in order to blow heated air into a home duct system or to be pumped into a coil in a water tank to heat domestic water?
    If it's supplying a heating coil, it's a Boiler.

    If it's heating water, it's a Water Heater.

    If it's heating water with the use of a heat exchanger, it's called an Indirect Fired Water Heater.

    If it's a unit that is heating the structure and domestic water, it's a Combi Boiler/Water Heater.
    (which can be an on demand water heater or using a domestic hot water tank acting like an Indirect Fired Water Heater)

  12. #12
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    See? Didn't I tell ya Greenhornet? It will never stop... the semantics of words used to describe what we learned to defend to the end of all time! NO BTU guru will ever change their/our minds!
    Teach the apprentices right... and learn from their questions and ideas.

  13. #13
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    It's almost as bad as that age old arguement.... which is better.... Chev, Dodge, or Ford.... it's all pretty sad actually.
    Teach the apprentices right... and learn from their questions and ideas.

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