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Type: Posts; User: pookley

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    Confused about definition of temp rise...

    I am a bit confused about what exactly "temp rise" is:

    1) Is it the difference between the air inside the house and the air coming out of the furnace?
    (If it's 65 in the house, and the temp rise...
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    Thanks for the info. I live in Los Angeles. Our...

    Thanks for the info. I live in Los Angeles. Our AC is used maybe 2 weeks a year, mostly in the late afternoon, and before bedtime to get to a comfortable temp. Once in a while it'll run a bit at...
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    Annual "tuneups" - necessary or sales pitch

    Are these annual or bi-annual tuneups necessary for HVAC equipment or is it just a money making service for companies?

    I hear from some people that only the filter needs to be changed while...
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    Relationship of BTU to temp rise

    In an earlier post I asked about the relationship between home size and BTU. Now I have another question:

    I've seen:

    40000 BTU furnaces with temp rise of 15-45
    40000 BTU furnaces with temp...
  5. Trying to understand need for lower or higher BTU units

    Let's say I have 3 homes of 1500 SQ.

    All 3 have 3 ton systems.

    But, one home has a 40000 BTU furnace, one has a 60000 BTU furnace, and one has a 75000 BTU furnace.
    (These are the specs of...
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    Are the BTUs determined by what the outside air...

    Are the BTUs determined by what the outside air temp is in the wintertime?

    Or by the size of the house? I thought the tonnage is what is determined by the size of the house.
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    BTU and Temp Rise Questions

    What exactly is the meaning of BTUs in a furnace? Higher BTU=hotter air coming out of the vents?

    What is temp rise? Is it just a range that the furnace will land in or is it a setting that can be...
  8. True. I guess it's just a personal pref. She's...

    True. I guess it's just a personal pref. She's originally from Canada where their systems run almost all the time at a low temp. When we go there now, we know it's warm inside, but it doesn't feel...
  9. Would a 2-stage furnace provide more heat than a...

    Would a 2-stage furnace provide more heat than a single stage 40k BTU unit?

    How and when does the system decide to go to the 2nd stage?
  10. It's not just reaching the desired temperature,...

    It's not just reaching the desired temperature, but the higher temp of the air helps my wife get relief for her joints and muscles quickly.

    With the smaller system, it would run longer with cooler...
  11. Sorry.

    Sorry.
  12. Am I getting the correct recommendation for BTUs?

    I currently have a 18 year old 3 ton 75000 btu furnace (GMP075-3). My home is 1100 SF.

    A contractor is recommending that a new system be 40000 btu (GMS80403A) for a home of this size.

    The temp...
  13. Am I getting the appropriate BTU recommendation?

    I currently have a 18 year old 3 ton 75000 btu furnace (GMP075-3). My home is 1100 SF.

    A contractor is recommending that a new system be 40000 btu (GMS80403A) for a home of this size.

    The temp...
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