UFH - 80m2 on one circuit for open plan area?

[Mr_T25]

I have an open plan kitchen and living room area which will be roughly 80m2. I have several quotes from different UFH suppliers, most have put 3 circuits on this area and therefore 3 thermostats. One firm has put this all on one circuit with the logic being that "because of air movement in the house, one of the thermostats would sense a lack of heat to start with and would warm the area that it controls. however there is nothing stopping this warm air moving and being replaced by the cold air, therefore the original thermostat which was originally calling for heat keeps calling it and the floor area for that gets very hot".

Is this correct? What about the alternative assumption that a 80m2 continuous loop will result in the water reaching the middle / end of the loop will not be hot?

 

[Dan Robinson]

1 circuit for 80m?

 

[DP]

Pipe must be able to circumvent the equator

 

[Mr_T25]

Just spoke to the company, they said it will be one zone but three circuits.

 

[Dan Robinson]

Slightly different then .

Yes if it is open plan if will be fine. Mine is 70m, and one single Zone.

 

[Mr_T25]

What downsides, if any, would you say there to having such a large area on one zone? Do you find some areas which are hot and other which are cold?

 

[Dan Robinson]

Laid properly and the flow rates set correctly, there should be no issues.

Mine incorporates the kitchen and living room as well as entrance hall.

 

[shambolic]

Mines is a lot bigger than that and one zone 6 circuits
The other zone is about that and 4 circuits.
2 stats in total. One for library one for lounge.

 

[PullerGas]

UFH companies make their money on controls, the pipe is the loss leader.
KISS!! Minimum controls are needed with UFH.