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  1. Replies
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    What improves efficiency on a newer unit? Coil...

    What improves efficiency on a newer unit?

    Coil failure? Is that common? Guess I was thinking it would last forever, except the wear parts.
    Is it internal wear, vibration, pressure surges?

    If...
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    I monitor flow and temperature all the time....

    I monitor flow and temperature all the time.
    Also monitor and control the cycle time keeping it between 15 and 50 minutes.

    It's closed system with the loop also going thru a large plate heat...
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    Good info I've thought of the pellet stove...

    Good info

    I've thought of the pellet stove option too.
    tnx
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    The map found dealer 20 miles from here. Is...

    The map found dealer 20 miles from here.
    Is there a way to search for him on forum to check him out?
    bbreer possible user name
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    Thanks, Hadn't thought of that. Warranty. ...

    Thanks,
    Hadn't thought of that. Warranty.

    What about expected life? As this runs year round. 10 years or possibly another 10?

    What other considerations choosing a replacement? Will any generic...
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    FHP R22 6 ton geothermal

    After 10 years of service I'm starting to worry about a compressor failure during a cold spell.
    Hybrid open/closed system. Almost never bring in elec. heat. Only 139 minutes this year. So heat-pump...
  7. Thread: heatpump air flow

    by INWO
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    488

    Tnx for replies. I have all the specs for the...

    Tnx for replies.

    I have all the specs for the units that I work on.

    Was aware of the relationship of watts, air flow, and temp rise, but not the formula. tnx for that!
    What I was looking for...
  8. Thread: heatpump air flow

    by INWO
    Replies
    4
    Views
    488

    heatpump air flow

    Being an electronic technician, I am often called on to design control systems for HVAC. But refrigeration and air flow calc is my weakness.

    Will measuring the input and output air temperatures...
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    Thanks I'll do a search. The 120 deg may be...

    Thanks I'll do a search.

    The 120 deg may be ok. For example, I could just use it in the bsmt zone.
  10. Replies
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    Geo heat pump info

    I'm looking for a geothermal heatpump that will supply hot water to an existing hydronic heating system (LP gas) located in bsmt.

    And also allow me to add an air conditioner in the attic.

    I...
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