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  1. #14
    Join Date
    Jun 2013
    Location
    NORTHERN
    Posts
    1,017
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    If any viewing 2013
    pls find EER over 30 for several GSHP and well GSHP, higher!
    and
    raw AHRI over 40 EERS in low-med (most running hours) blended "raw" data]
    and NEWS:
    Hydro-Temp got its (unnecessary) 3rd party rating.

    (see sites for several OEM's, below)

    Hydro-Zone is a tm of Hydro-Temp for the chilled water and HW off of a forced-air same-unit system that uses the rfg off the air HX coil with modulated or no blower speed--- just for Mini-like distribution to console fancoils etc... but EER's higher, and the Heat-Reclaim 100% on demand HW IS pushing COP's near 6 as in cooling mode, the loop pumps are off line. 4zn board OEM since 1995
    ... however, much work still needs to be done.

    CLOSED LOOP 2015 listed EER's over 34 EER "blended from low to high variable speeds" for 32deg.F ~ E-Star

    Perhaps you need a 32F Chiller/HW-Heat: buy a GTHP
    http://www.energystar.gov/index.cfm?...mal_heat_pumps

  2. #15
    Join Date
    Mar 2015
    Posts
    4
    Post Likes
    I have a similiar problem, but I only have around 1500 square feet to heat. The house was built in the 1930's and there are no heating ducts. I would like to use a geothermal heat pump to heat between one to as many as four air exchange fan-coil heating units. As yet I have not been able to find such a system on the market. Is there such a system? or Could I design my own and could anybody help me with such a design?

  3. #16
    Join Date
    Mar 2015
    Posts
    4
    Post Likes
    if you can help me with this project please send me an e-mail to: < Please put your email address in your profile, they are nt allowed in post, thank you. >
    Last edited by beenthere; 03-24-2015 at 02:37 PM. Reason: email

  4. #17
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    8,266
    Post Likes
    Geo
    Email address are not allowed in posts please put in your profile.
    Also don’t hijack old threads, please start a new one.

  5. #18
    Join Date
    May 2008
    Location
    Columbia,SC
    Posts
    85
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    pecmsg:

    If you think it is relevant perhaps you can delete my post and re-post this to this old thread (I'm not a professional member but this information may be of use to members):

    I discovered LG makes a single phase water sourced up to 4.4 ton (cooling) VRF (or mini split) system: http://www.lg-vrf.com/multi-v-water-mini.aspx

    But it seems to be primarily aimed at high rise apartment buildings.

    I couldn't find any stated IEER, SEER, COP or EER data in any of the product literature but some charts I found would seem to imply it's about 22 EER (I think I used 70 degree water but I'm not sure I did the calculations right using the tables in the LG manual.)

    While "good" it does seem somewhat low for a water sourced VRV system. Especially considering LG has announced air sourced systems as high as 36 with promises of 40 in the future.

    Also I thought the stainless steel heat exchanger it has would be suitable for well water (like cupronickel) but reading the literature I see a secondary heat exchanger is recommended to isolate the loop. That's not good since a delta T will need to be maintained between the loops to get any heat transfer and of course we'd have pumping losses in two loops although one would be a closed loop. If that raised the loop to 80 degrees the EER would drop and when pumping losses are factored in the efficiency is probably still less than some air sourced VRV systems so I hope I did the calculations wrong.

    If you feel this is relevant to those searching this topic please re-post under your professional identity and if not just delete my post. Thanks

  6. #19
    Join Date
    Jan 2004
    Location
    PA
    Posts
    70,447
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    Please put your email address in your profile, they are not allowed in post, thank you.
    Last edited by beenthere; 03-25-2015 at 05:48 PM.
    Contractor locator map

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    How many times must one fix something before it is fixed?

  7. #20
    Join Date
    Mar 2015
    Posts
    4
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    Need help recomending a system

    Quote Originally Posted by geoductless View Post
    if you can help me with this project please send me an e-mail to: < Please put your email address in your profile, they are nt allowed in post, thank you. >
    I am a new homeowner, not a professional in the business, and do not readily understand the jargon. I have aproximately 1200 to 1500 square feet that I need to heat and dehumidify or drive off the moisture; I live in the wetest region in the lower 48. I have no heating ducts, and do not want to use them. I would like to install a geothermal heating system housing the pump in my unfinished basement, and running two coolant lines up through the basement to two different locations along the same wall separating my kitchen and living room from the bathroom and two small bedrooms with connecting hallway between the bedrooms which are located at the two ends of the house. There is a location along that wall where a heating/cooling coil and fan could be installed on both sides of the wall which could heat the bedroom and kitchen, and there is a similiar spot west along that wall where the same type set of dual heating/cooling coils and fans could be located heating the second bedroom and the living room. I would like to be recomended a geothermal system which could be set up this way. I need to know the exact product and where and how to go about obtaining and getting it installed.

  8. #21
    Join Date
    Mar 2015
    Posts
    4
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    Is is possible to design a small space heating geothermal system without ducts?

    Quote Originally Posted by hult View Post
    Historic house is three-story, 180-years-old, solid brick interior and exterior walls with installed (some badly) ducts. Low-R envelope and resulting high energy $ has driven us toward 9-ton, closed-loop geothermal solution.

    And unusual heating and cooling loads and difficulty of installing ductwork through brick walls -- especially to second floor -- make at least partial ductless multi-split from GSHP attractive. (Hydronics alone don't solve cooling need.)

    There are plenty of split GSHPs with conventional air handlers available, but seemingly no ductless GSHP systems. Is there a commercial solution? Or would one have to be customed engineered? Seems like some progressive company would have been onto this combination by now.

    TIA ... Marc
    Is there some insurmountable obsticle preventing the design of geothermal heating
    systems which utilized cooling fins and fans piped directly to the area needing the BTU's?

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