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  • 5 ton geo thermal heat pump

    my buddy who lives in minn. is looking to purchase a 5 ton geo thermal heat pump for his farm house. is there such a thing as a propane back up?

    does anyone have a suggestion for a brand and an approximate price for the unit only. he will be installing it himself or with some help.

    thanks,

    rick.
    phoebe it is

  • #2
    Re: 5 ton geo thermal heat pump

    Rick, we install Rheem and Ruud (same company) but the important thing is to purchase a unit that you can get parts for if you need them. You can back up with propane, nat gas, electric or even hydronic if needed. Have him check the local supply houses and see what they carry.
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    • #3
      Re: 5 ton geo thermal heat pump

      do you have a model # for the 5 ton and an approximate price for the unit?

      rick.
      phoebe it is

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      • #4
        Re: 5 ton geo thermal heat pump

        you dont need a back up you will always get the heat you need from the ground .its not like a air heat pump where when it gets to cold out it stops working , the ground is always going to be 40* to 50* .
        we never were asked to put in a back up
        Charlie

        My seek the peek fundraiser page
        http://observatory.mountwashington.o...nal&fr_id=1040


        http://www.mountwashington.org/weather/conditions.php

        new work pictures 12/09
        http://public.fotki.com/hvachawk/

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        • #5
          Re: 5 ton geo thermal heat pump

          this is a very good brand unit ,we use this
          http://www.climatemaster.com/index/comm_system_compare
          Charlie

          My seek the peek fundraiser page
          http://observatory.mountwashington.o...nal&fr_id=1040


          http://www.mountwashington.org/weather/conditions.php

          new work pictures 12/09
          http://public.fotki.com/hvachawk/

          Comment


          • #6
            Re: 5 ton geo thermal heat pump

            Every Geo unit I install has electric backup. The reason being is the heat output is low compared to the cooling side.

            For instance, a ClimateMaster TTV064 (the closest thing they have to a 5 ton) has a cooling output of 64,800btu and a heat output of 48,000 when using a closed ground loop. Not too many houses here or in Minnesota are going to meet these design conditions. The best way to make up for the lack of heat is to install the factory supplied electric elements which are available in 5,8,10,12,15 and 20 kw. Or, you can size the unit for proper heating out of the heat pump but then you will be way overcooling.

            Here, one of the rural electric providers I deal with provides a special winter electric rate which makes the electric backup affordable to run. After doing the math its the equivalent of 68 cent per gallon LP.

            I recommend either the ClimateMaster or the Ruud, as the Ruuds are ClimateMaster.

            Andy

            (formerly Ruudacguy Lost my password and could never get a return email from the site boss)

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            • #7
              Re: 5 ton geo thermal heat pump

              Electric may be a economic viability today.
              tomorrow may not be the case.

              Are the propane or natural gas units inefficient?

              I realize natural gas is out for those in the sticks.

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              • #8
                Re: 5 ton geo thermal heat pump

                I have never seen a factory option for a fossil fuel backup kit. Only electric. I suppose a person could add a gas furnace into the mix with some staging controls and motorized plenum dampers to prevent recirc. Manufacturers recommendations and local codes might dictate otherwise though.

                If the heat pump is sized correctly the backup should only run less than 5% of the total heating hours anyway.

                Andy

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