Has anyone got any experience in using heat pumps to supply hot water to in slab hydronics? I can't find much info on the net about appropriate models to consider. Can a pool heating heat pump be used if the hydronics are run at low pressure? Are regular DHW units used or are there specialised units for this purpose?
Heat Pumps for in slab hydronics?
(10 posts) (3 voices)-
Greg
MemberMunter, I've not seen domestic hws used for this. There are plenty of GSHP supplier etc that supply units to do hydronics. I am guessing the efficiency / size is the reason. I am hopefully meeting with my hydronics installer this week so I'll ask the question for you. It may work for a small installation. Here is typical GSHP http://www.directenergy.com.au/ there are many others.
If you have a rough idea of area to heat I can also pass on those numbersPosted Friday 8 Apr 2011 @ 8:08:41 am from IP # -
bkl
MemberTry these:
http://www.skylineenergy.com.au/
http://www.ureco.com.au/solar-hot-water/Hydronic+HeatingPosted Tuesday 30 Aug 2011 @ 3:18:24 am from IP # -
bkl
MemberThere is this one as well, but it does not cope well with cold temperatures. It falls back to electrical resistance heating if it gets too cold.
http://www.daikin.com.au/uploads/assets/DAI0007_Altherma_Broch_v8_22_Dec_09.pdf
Please let me know how you go. I am looking for a heat pump supplier as well and am finding it very frustrating.
Posted Tuesday 30 Aug 2011 @ 3:25:37 am from IP # -
bkl
MemberDaiken has also intriduced a new model into Australia: http://smartheat.com.au/product_boilers_daikinAltherma.html
(which is also available at SmartHeat)
It still has the electrical backup heater but I have also downloaded the sizing software and run it against a house spec. similiar to what I expect to build and it might not be too bad. Possibly as low as 2% of heat being provided by the backup heater.
Posted Monday 5 Sep 2011 @ 3:48:23 am from IP # -
Thanks BKL.
I called up smart heat and talked to them about their product. They advised that you can leave the back-up resistive heating disconnected so that it never activates. The smallest model they have is 11kW of heat delivered which is probably a bit oversized for my application but probably ok for most houses. The COP is pretty good at 4.5 (I think this is measured at 6 degree ambient - so quite good performance). The cost of this system would be a sticking point for me though with not much change from $10k just for the heat supply side (ie - no floor pipes...)Posted Monday 5 Sep 2011 @ 5:46:34 am from IP # -
bkl
MemberYou can download the sizing software for the Altherma here: http://www.daikinaltherma.eu/
Posted Monday 5 Sep 2011 @ 6:56:10 am from IP # -
bkl
MemberThese guys also supply air source heat pumps: http://www.evoheat.com.au/
Posted Thursday 8 Sep 2011 @ 1:51:09 am from IP # -
bkl
MemberI have found this one which looks like it will fit the bill
http://www.evoheat.com.au/domestic-heating-systems/hh-series/
Posted Tuesday 18 Oct 2011 @ 6:05:51 am from IP #
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