HUGE Problem with My New Geothermal/Radiant System

Discussion in 'General Discussions' started by Forum Administrator, Jan 1, 2008.

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  2. bobmarker

    bobmarker New Member

    Just finished our retirement dreamhome in NE Idaho. It's a big 5500 sqft. plus 2000 sqft. of heated garage space (huge ceilings).

    Now that we are moved in, we have had nothing but trouble with our radiant floor heat and geothermal system.

    The system appears to not be able to keep up with our heat demand. We are in our 60s, so we like it warm (but not crazy hot). We would like our house to be set at 72, but now that the system has been running for 3 weeks, it is still not able to get up past 68 even with the geothermal pump running full time.

    We extract the water from the well and dump in a pond. The heating guy says it should rise about 1 degree an hour, but we are flat lined at 66-68 degrees now, even though the thermostats are all set at 72.

    Any suggestions? I just spent $45,000 on this system.
  3. urthbuoy

    urthbuoy Well-Known Member Industry Professional Forum Leader

    Two areas you can go after: distribution and source. We can't really comment on either as we don't have enough particulars.

    I'd suggest turning off the garage zone and seeing if your system can match the load in the house, that may be an indication of an undersized system. If it still doesn't keep up, you may have poor piping layout (or a mechanical) or a very-undersized system.
  4. GeoXNE

    GeoXNE Guest

    I ditto what Urthbouy says adding that the problem could also be a control issue (miswired or bad setpoints). Does the geo unit itself run fulltime now?

    I suggest you talk to the guy you paid the $45,000 to and let us know.
  5. Mark Custis

    Mark Custis Not soon. Industry Professional Forum Leader

    There are two issues here

    Geo system and radiant. Neither of which should be attempted by the unknowing.
  6. Howard Ek

    Howard Ek Member

    What model # heat pump do you have?
  7. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    More importantly, start with the ACCA Manual J or equivalent load calculation.

    A load calculation was performed, yes?
  8. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    Throw in the radiant design and capacity at ?temp.

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