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GSHP Vs Air to Water

  • 08-01-2020 11:24pm
    Registered Users Posts: 2,177 ✭✭✭ ECO_Mental

    I know this might have been discussed before ad nauseum but since technology is constantly moving and improving I just wanted to see what peoples opinion is of today.

    I am planning to build a new house in the country on a 1.25 acre site and I need to choose between Air to Water or GSHP for all heating and hot water. From what I hear GSHP have a better overall COP on average over the year, are more reliable but are more expensive mainly due to the fact you have to install either a ground collector or a bore well.

    Is this still the case??

    I know all the manufactures are pushing A/W now but my thoughts are I will be drilling for a well anyway on site for drinking water so it wont be as expensive to drill if they had to specifically mobilise just for the GHSP. Also I will have diggers on site for percolation area so if I decide to do a collector array again it should cost less.

    Or is it the case A/W now are just as efficient and reliable as GSHP....



  • Registered Users Posts: 8 ✭✭✭ BFMadden

    All things being equal, GSHP will outperform A2W and out live it. Heating load being low in modern houses might off set this given that A2W is cheaper to install. If it's a house you plan on living in for 20+ years I'd go with GSHP.