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  1. Replies
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    “I've actually seen air to air systems with...

    “I've actually seen air to air systems with higher EER's (close to 20) at part load than some of the water to water GSHP's!”

    The question is at what temperatures…

    “And making matters "worse"...
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    I could only take the 1st 2-min. Sounds like...

    I could only take the 1st 2-min. Sounds like leftist crap to me!
    '1% of the population own 40% of the money...people starving... blood on American money. Sounds like the only 'solution' is...
  3. Replies
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    Sounds like something is definitely wrong with...

    Sounds like something is definitely wrong with the design and/or installation! Are the ground loops connected in parallel, 1-loop per ton, reverse return with properly designed header or is it a...
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    You probably require about 150 ~ 200 vertical...

    You probably require about 150 ~ 200 vertical feet per ton of borehole. Since you already have zoning, use the existing GSHP for an appropriately sized zone and install additional GSHPs to properly...
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    Standing Column

    Standing Column is hardly a viable option for a residential installation. You did not to mention DX.

    SR
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    The preferred solution is either Liquid-to-Water...

    The preferred solution is either Liquid-to-Water or DX-to-Water Geothermal Heat Pump(s) with Hydronic fan coils. This solution will satisfy both heating & cooling - without the need to install forced...
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    Neither will anything else…it’s all relative… ...

    Neither will anything else…it’s all relative…

    SR
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    My 2˘

    I’m just saying that’s what a kW of heating would cost. Crunch the numbers any way that suits you.

    Regarding "˘", I can tell you how to do it if you’re on a Mac. If you’re on a PC, I’m not sure…...
  9. Replies
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    So, if you install a geothermal unit with a COP...

    So, if you install a geothermal unit with a COP of ~4, your heating will cost you ~1.5˘/Kw of heat. Nat. gaz won’t cool your house.

    SR
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    Very well done - I liked it! Bravo! SR

    Very well done - I liked it!

    Bravo!

    SR
  11. Replies
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    5,320

    Having had experience installing Nordic DX...

    Having had experience installing Nordic DX systems, both DX-To-Air and DX-To-Water, I can tell you that they are excellent and VERY reliable machines. As an owner of a Nordic DX HP in my own home I...
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    http://www.nordicghp.com/mg/ Then click on...

    http://www.nordicghp.com/mg/

    Then click on 'Manuals' or 'Products', then 'DX'.

    Best DX machines I ever seen...

    SR
  13. Thread: Oldest Geo

    by fsq4cw
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    1989 Geo

    VERY FUNNY!!! LOL
  14. Replies
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    There should not be any negative ramifications of...

    There should not be any negative ramifications of letting your HP sit idle all summer. However, having BOTH a desuperheater AND an ‘extra’ full capacity hot water loop running threw your DHW buffer...
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    I’m going to go out on a limb here and say your...

    I’m going to go out on a limb here and say your HP is either a DX-55 or a DXS-55. You’re probably producing about 10-Igph/hr of hot water.

    I don’t think it’s worth running a GSHP for the sole...
  16. Why should that make a big difference with a...

    Why should that make a big difference with a closed loop ground loop heat exchanger?

    SR
  17. The first things you have to know definitively...

    The first things you have to know definitively are, flow rate in gallons per minute, entering water temperature (EWT) and leaving water temperature (LWT). These are the first steps to determine...
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    My advice would be to hire a professional...

    My advice would be to hire a professional engineering firm with a geothermal specialty.


    As mentioned previously, an in-situ test borehole must be drilled (with results good for that depth...
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    I would suggest taking the Canadian GeoExchange...

    I would suggest taking the Canadian GeoExchange Coalition - Installers' Course. Or purchase a copy of CAN/CSA C-448-2 'Design and Installation of Earth Energy Systems'.
    Should you decide to take the...
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    I don’t think this forum is the appropriate place...

    I don’t think this forum is the appropriate place to discuss consulting fees. Consulting could involve all the items you mentioned and more. One thing it would not involve and that would be the...
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    Training is the issue. Fewer than 25% of the...

    Training is the issue. Fewer than 25% of the people working in the geothermal industry have had any formal training in this area. This is why your costs have ballooned by 30% - so where’s your...
  22. Replies
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    Hi John, HC = Heating Capacity (Total Output)...

    Hi John,

    HC = Heating Capacity (Total Output) in BTUs, CFM (Cubic Feet Per Minute, fan capacity), LAT (Leaving Air Temperature at the supply plenum), EAT (Entering Air Temperature at the return...
  23. Replies
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    Thank-you for not taking terrible offence to my...

    Thank-you for not taking terrible offence to my comments.

    I think you may have to wait till later in the season to access efficiency. You will have some idea as to how well you’re doing by...
  24. Replies
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    This is just my own personal opinion, however,...

    This is just my own personal opinion, however, your ground loops could/should be designed differently if efficiency is what you desire – and geothermal is all about efficiency!

    First of all,...
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    Just a couple more questions. Is your flow rate...

    Just a couple more questions. Is your flow rate right for the size of your system, concentration and type of antifreeze you're using? Has your system been properly flushed and purged since this...
  26. One reason your installer doesn’t want to do...

    One reason your installer doesn’t want to do reverse return may be that he’s planning on connecting the boreholes in series. So…

    You mention manifold in your post. To me that should always suggest...
  27. Replies
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    Boreholes should all be drilled to the same depth...

    Boreholes should all be drilled to the same depth as specified in the contract. Perhaps it should also be specified in the contract that the contractor must provide proof of borehole depth and loop...
  28. Modeling with Wrightsoft

    Your house as it exists today has a certain heat gain/loss irrespective of the type of heating system. The Manual J analysis will give you all the data you need to choose any system. Geothermal loop...
  29. Well it sounds like you’re on the right track....

    Well it sounds like you’re on the right track. Ask the contractor with the Wrightsoft software if he has the 'Geothermal Package' of Right-Suite Universal software, if he does, he should be able to...
  30. Too bad you didn’t take your own advice, you were...

    Too bad you didn’t take your own advice, you were probably almost 2/3 the way to having 3-boreholes drilled for a closed loop system that could have been modeled with Right-Loop by Wrightsoft, part...
  31. I would suggest hiring a properly trained and...

    I would suggest hiring a properly trained and accredited geothermal installer that is experienced and can offer solid references. Someone with whom you develop a good rapport, someone who will do the...
  32. Replies
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    Get another installer!

    I’m sorry to have to say this, but your installer sounds like an idiot! Get another installer (ISGHPA Accredited) in there that knows what he’s doing and have him measure the systems actual COP,...
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    Model with appropiate software

    While it won’t hurt (except in the pocket book) to drill deeper, you can also increase efficiency by using geo clips to separate the pipes in the borehole and the use of thermally enhanced bentonite...
  34. Replies
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    In this case I agree... SR

    In this case I agree...

    SR
  35. Replies
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    For a reliable installer ‘click’ & navigate this...

    For a reliable installer ‘click’ & navigate this link:

    www.igshpa.okstate.edu

    A vertical closed loop system may be most appropriate for your situation. A water table 2 ~ 4 feet from the surface...
  36. Replies
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    I’d get a quote on geothermal if you have forced...

    I’d get a quote on geothermal if you have forced air. With a COP of ~3.5 that would bring your cost down to ~ 2.5˘/kW, or less with a higher COP. Get rid of the oil furnace.

    SR
  37. Replies
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    1500ft of borehole should be sufficient, although...

    1500ft of borehole should be sufficient, although that may be the minimum requirement.
    That works out to 150ft per ton. Be sure that this is enough to reject the heat from the envelope during peak...
  38. Thread: Geothermal HVAC

    by fsq4cw
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    719

    ‘Click’ on this link: http://geoexchange.org ...

    ‘Click’ on this link:

    http://geoexchange.org

    It used to be a great site. Lately it’s gone in the toilet, but see what you can get out of it.

    SR
  39. Replies
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    FFirst of all, I hope your contractor did the...

    FFirst of all, I hope your contractor did the proper Manual J load calculations. Sounds like the folks at Climatemaster would like you to spend a lot of money. The answer to your question is quite...
  40. Replies
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    While it is true that a GSHP will be much more...

    While it is true that a GSHP will be much more expensive up front, it is also true that if you do a life cycle analysis that you come out ahead with the GSHP. GSHPs have higher efficiencies resulting...
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    I would suggest navigating the IGSHPA web site...

    I would suggest navigating the IGSHPA web site and contacting a ‘Certified GeoExchange Designer’ in you area.

    SR
  42. Replies
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    I'm sure there's a wealth of info to be mined at...

    I'm sure there's a wealth of info to be mined at Google, but you can start with this link:

    http://www.evansville.k12.wi.us/geothermal/index.html

    SR
  43. Replies
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    I wish to correct my last post. 7.5-T = 24USGPM...

    I wish to correct my last post. 7.5-T = 24USGPM min. Consult manual & professionals.

    IMO

    SR
  44. Replies
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    Without going into all the issues regarding open...

    Without going into all the issues regarding open loop systems, at 7.5-tons, you will need to pump at least 18gpm, minimum. However – consult the installation manual specifications for the specific...
  45. Replies
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    In-situ borehole test of ground conductivity

    Never mind the drilling cost. Are the building owners ready to pay the cost of even 1 in-situ borehole test of ground conductivity?

    SR
  46. Replies
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    Get professional advice!

    You'll have to consult with a professional engineering firm that specializes in institutional, commercial, and industrial geothermal & HVAC design. There's no way around it; otherwise you'll never...
  47. Replies
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    I agree with this post. In addition, I would also...

    I agree with this post. In addition, I would also check Entering Water Temperature (EWT) and Leaving Water Temperature (LWT) of the ground loop at the HP. Antifreeze and corrosion inhibitor fluid...
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    I would suggest installing a closed loop system...

    I would suggest installing a closed loop system from the outset – particularly if your water quality is questionable. Look for a design that will likely be the most trouble free from the start. This...
  49. [QUOTE=poolecw;1870565] "4. Florida heat pump...

    [QUOTE=poolecw;1870565]

    "4. Florida heat pump closed loop geothermal system with heat recovery and water heater accessory on main. Standard ERV on second floor. System will be 5 ton total. up...
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    I would suggest having your well tested for more...

    I would suggest having your well tested for more than just capacity. It should also be checked for water quality.

    Pumping well water 'up hill' for 500 feet could be expensive! I would also suggest...
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