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Help on Air Source Heat pumps

  • 07-08-2007 11:34am
    #1
    marielle
    Closed Accounts Posts: 43 ✭


    Hello there,
    I am a new builder and I had decided a long time ago that i would be using underfloor heating downstairs and upstairs but was still unsure about what kind of heating system would be powering it.
    I had decided on a Ground Source Heat pump but i must say the quotes I got for the vertical bore holes scared me a bit, ok, a lot!!!!!!:eek: So did the possibility of the local council turning around in a few years asking me to dig it all up for environmental water pollution issues. (Is there any truth to that or is this total science fiction by the way!?!?! Anyone know?)
    I remember a few years ago looking into Air source Heat pumps and finding that they simply weren't up to scratch or so said everyone I asked. Broke easy, not as efficient, short warranty, expensive to repair.... Does anyone know if this is the case still or have they come a long way since? Are they a good option now? This is what i read on one of the posts here "the argument goes that the cost of the heatpump together with the much lower installation costs (no ground works etc.) means that although your long term running costs will be higher you will have a much quicker payback on your investment, the jury is still out on that one." Well, that was back in august 2006... have things changed since?
    Some say that it would be better to go for the cheaper system now and when a better technology comes along in a few years (like a cheaper, less deep vertical collector technology) it would be easy enough to connect it up to my existing system then.
    Basically, I would love to hear anyone's opinion and thoughts on the best option to go for...... thanks for any imput.....:)


Comments

  • #2
    yop
    Moderators, Home & Garden Moderators, Regional Midwest Moderators, Regional West Moderators Posts: 16,724 Mod ✭✭✭✭yop


    A quick summary - as regards efficency/COP:

    Best - water based, bore hole, geothermal, air sourced.

    Direct Expansion (D/X) has a higher performance than a Brine (water and anti-freeze) heat pump, it has at least 1 less circulating pump so uses less electricity, also uses less piping in the loops.

    Council making you dig it up is a joke.


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