It does not take all day to heat up
Perhaps with a low kW electric system.
This would work if you can tee into the heating before anything else - the first tee off at the boiler?
andrew, the system i am talking about is a water fed system with its own zone as i stated originally , the question was will it be economical to run along side a standard sustem ?
If you can tee in right at the boiler then you can use a 2 port valve on the new circuit
Plus a 2 port on the existing heating
wire it as an S plan
so when you want your underfloor on only then it will only be that circuit running
you will just need a room stat in the area to control the valve
The boiler is then run by the two valve independantly
The room stat reaches temperature, the valve shuts and the boiler turns off
You will have to fit a mixing valve at the underfloor end though as standard heating temperatures will be too hot for the floor or if you run at underfloor temperatures then you heating may not heat the house effectively
Sorry - typing as fast as I am thinking, do you understand this?
i Do Andrew, the underfloor has its own feed and zone so its totally seperate from the other system, i was just worried that it would be expensive to run withit just being for 1 groundfloor room, as i was told you need to keep underfloor switched on and just let it use the thermostat , because the water takes a while to warm up< is that so?
You may be only running it as 45 degrees, but will be fed with 70 water from the boiler and then mixed down to 45 degrees
The boiler will run for an hour but then turn off and then turn on again when the return temperature drops again
Just like having a large cool radiator under the floor
The room stat will control this and can be set to a minimum air temperature of 15 degrees or so
If you wanted to run radiators then it could be controlled exactly the same but would heat up quicker due to a higher water temperature