Rads with underfloor heating on same boiler/system?

[Deansplit]

I am doing a kitchen extension and want to install underfloor heating. the rest of the house is standard radiators. Can I run the two from the same boiler/system? I am advised that underfloor requires longer to heat therefore the rads would be on longer than necessary? If so, is electric underfloor my only option for underfloor... and that means a separate control... and is it any good??

Thx

Dean

 

[kevplumb]

you have been advised wrongly

yes both systems can be run from 1 boiler if properly installed

 

[Deansplit]

Hi - can u enlighten further?? The advise I was given (and am lead to believe) is that rooms heated by rads heat quicker and rooms heated by underfloor heating take longer and need time to build up so both conflict each other?

 

[pannierstan]

As far as I am aware you need a boiler capable of running the 2 systems at different temperatures. I have seen them on several occasions but have never worked on one.
Cant remember the name but perhaps someone else can enlighten you.

Regards Stan

 

[kevplumb]

rads fed straight from the boiler via an s plan or s plan plus underfloor fed from boiler via its own zone valve(part of the s plan) and blending valve and of course pump

rads get hot heating zone for rads closes down

underfloor keeps getting heat as its on a seperate zone

 

[pannierstan]

Didnt know you could do that Kev?

Doesnt underfloor need to run at a far lower temperature period. Even with a blending valve boiler will still get too hot for underfloor unless the boiler stat is turned down lower then the rads will be poor?

Regards Stan

 

[glasgowgas]

Didnt know you could do that Kev?

Doesnt underfloor need to run at a far lower temperature period. Even with a blending valve boiler will still get too hot for underfloor unless the boiler stat is turned down lower then the rads will be poor?

Regards Stan

what do you think the "blending" valve does?

 

[njk]

Hi,

There are a few companies who do single zone wet underfloor heating.
You can plumb it in to an existing rad circuit, but that would be on the same time as the central heating. Only way to get away from that is to have it on as a separate zone, i.e. with it's on 2 port zone valve.

I would advise you to contact continental ufh, they will give you the details you need, (and supply pipes, drawings and instructions).

Lolli

 

[Deansplit]

Thanks - lots of good advice here, will look into this Co.

Cheers

 

[kevplumb]

try nu heat

 

[Deansplit]

Many thanks... while I'm on the subject, I seem to have noticed (but correct me if this is not true) that tiled floors hold the heat better than timber?

 

[tamz]

Any solid floor surface will be better for underfloor than timber. Timber is a poor conductor of heat so heat output will be lower than a solid floor and will need to be sized accordingly.