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Heat pump Sizing

abennett
abennett Member Posts: 6
in THE MAIN WALL
My daughter bought a house(center hall colonial) in Maryland that uses a gas furnace for the 1st fl & basement and a heat pump (heat/ac) for the 2nd fl.

The second floor does not heat very well with the heat pump and I would like to obtain a simple form to check the heat loss/gain and the size of the heat pump.

Any help would be appreciated.

Al

Comments

  • JimGPE_5
    JimGPE_5 Member Posts: 8
    HP

    Does the heat pump maintain the temperature of the second floor at setpoint and the space is just uncomfortable anyway? or does it have trouble maintaining room temp?

    When was the last time she changed the filter?

    Does the outside unit ever have ice on it during the heating season?

    Can the HP cool the second floor in the summer?

    Does it EVER keep the 2nd floor comfortable? Does it just lose control in the very coldest of weater or is it a problem all the time?

    How many square feet of floor area does the heat pump maintain? How many tons (cooling) is the heat pump?

  • Ken D.
    Ken D. Member Posts: 836
    Heat pump

    Jim has very good advice and questions. A few small facts. the heat pump has a lot less recovery than the gas furnaces. The thermostats should not be set back at any time (unless you need to for comfort, and if you do,set it back only a degree or two.) Does this HP have supplemental heat? You may need it for the very cold days. Is the space insulated properly? Because of the cooler discharge temperatures, the heat pump can feel uncomfortable to someone who is used to gas or oil heat.
  • jim lockard
    jim lockard Member Posts: 1,059
    Cold Pump

    How old is the machine and has it been properly serviced ??
    Lack of service is most of a heat pumps problem.Best Wishes J.Lockard
  • john_35
    john_35 Member Posts: 29
    heat pump

    Heat pumps are sized by the cooling load (or heat gain) and usually have some type of back-up for when they can't keep up in cold (below 40 deg) weather. It sounds like yours has electric back-up (if any) because you would know if it was gas. I suggest you call a pro to do a heat gain calculation and tell you what you've got and if it's enough. The single most effective way to save on operating costs and improve comfort is to replace the windows and doors. If your house is hemorraging heat it won't help to put more Btus in as much as it will to stop the bleeding!
  • Ted_9
    Ted_9 Member Posts: 1,718


    You can get a single use or temporary load calc program from this site. www.hvaccomputer.com

    I use this program and its great.
  • JimGPE_5
    JimGPE_5 Member Posts: 8
    Hmmm

    Looks like we lost Al....
This discussion has been closed.

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