What size heater do I need for conservatory/

[ROBOROB]

Hi
My conservatory is 12ft x 15ft and has underfloor heating.
The underfloor heating only takes the chill off the room and so the room isnt really warm enough to use.
I would like to fit an electric panel heater, but dont know how big the heater should be.

Can anyone help?

Thanks in advance
Rob

 

[breezer]

get an oil filled radiator with built in stat

 

[ChrisR]

Sounds like 40 m squared of single glazing. If it were all wooden windows (vertical) then the U value would be about 5.7.
temp difference 20 degrees gives
40 x 5.7 x 20 = 4.5 kW
Yours might be pvc, double glazed, the roof will lose heat much faster if the same material, but it might be tri-wall or better which loses less heat.

Umm,,
get an oil filled radiator with built in stat
say 3kW, and see how it goes!