05-02-2013, 05:34 PM
The block & beam is about 18", then there is about 6" of screed & UFH. On the underside there is insulation & an air gap which is where the remaining bit comes in. Takes 2 days to heat up, but after that the temperature stays pretty much fixed +/- a degree or so all year round.
On the CoP front, a typical OFCH boiler has an efficiency of between 0.8 & 0.9, which means that efficiency wise, our GSHP is about 3.5 time more efficient. Yes, the pumps aren't cheap, but they typically have zero or very very low maintenance costs over their life and are really simple, proven, technology. The pay-back is very quick...
On the CoP front, a typical OFCH boiler has an efficiency of between 0.8 & 0.9, which means that efficiency wise, our GSHP is about 3.5 time more efficient. Yes, the pumps aren't cheap, but they typically have zero or very very low maintenance costs over their life and are really simple, proven, technology. The pay-back is very quick...
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