GSHP and UFH Zones

Phaictan

What are the forums opinions on the advantages/disadvantages of having separate room underfloor heating zones in a 2 storey house, as opposed to having only 2 zones (a downstairs and an upstairs).

The way it has been explained to me is that by having only 2 zones you can take advantage of night rate electricity to heat the system to a comfortable whole house temperature. If you have multi room zones then the heat pump will be switching on and off at all times of the day and night to maintain the individual temperatures set for each room.

Is this true or just a myth?

Cheers

PT

Western_sean

Does this mean your underfloor heating would be controlled by just 2 thermostats?

Whether it does or not as I understand it your underfloor heating system should circulate water internally to get the maximum use from it before trying to add more heat to the system. So I'm not sure the point about your heat pump switching on and off all the time is correct

holdfast

yea best to have few zones as possible because of the reason you gave and it all so allows the heat pump to get up to max effi and run at that for a sustained time. Rather than starting up and switch off