UFH with or without tank?

[mayurw]

I currently have a Valliant combi to which I'm going to add UFH system to. So my question is if I wanted an efficient system, would it be better to have an unvented cylinder installed and have the UFH run of that?

 

[Dan Robinson]

Eh?

 

[mayurw]

I thought I saw a hot water tank on display in the plumbers merchant the other week that had an UFH outlet but I might have been mistaken in that case

So running the UFH directly off the combi is fine and works well? the pipes will be going down in a screed.

Thanks

 

[Dan Robinson]

If it's piped properly yes.


You were looking at a thermal store.



UFH is a very expensive thing to screw the installation of up. I suggest a bit of extra research.

 

[Agile]

At least it is very cheap to screw up the installation of UFH.

It is putting it right that is expensive!


I once went under the boiler maker's warranty and found a DIY UFH system.

Trouble was they had no idea how to do it and had laid about 110 m of 10 mm copper tube in carefully cut out plywood and then tiled all over it before testing it.

Not surprisingly the heat loss of the copper tube meant that the temperature of the UFH tube was already at room temperature after only a few metres. There was no easy to solve the problem apart from a completely new installation.

 

[DP]

I don't understand what you mean tony. Many questions come to mind.

 

[rules&rulers]

I once went under the boiler maker's warranty and found a DIY UFH system.

UFH is eaily bo//ocked up.

 

[Dan Robinson]

Trouble was they had no idea how to do it and had laid about 110 m of 10 mm copper tube in carefully cut out plywood and then tiled all over it before testing it.

Not surprisingly the heat loss of the copper tube meant that the temperature of the UFH tube was already at room temperature after only a few metres[/QUOTE]

I don't think so some how.

 

[DP]

110 meters of 10mm copper pipe in a coil? Who sells such a thing? Anyone know?
Insulate or not

 

[rules&rulers]

Think it was a typo,or the medication needs a review.

 

[John D v2.0]

Trouble was they had no idea how to do it and had laid about 110 m of 10 mm copper tube in carefully cut out plywood and then tiled all over it before testing it.

Not surprisingly the heat loss of the copper tube meant that the temperature of the UFH tube was already at room temperature after only a few metres. There was no easy to solve the problem apart from a completely new installation.

Not surprisingly to who? Those first few metres must have been literally red hot to dissipate around 2kw of heat in that short distance! And the steam in the pipes must have been pretty much stationary.