UFH to help cooling?

[Mike]

2 hours ago, JohnMo said:

6 hours ago, Mike said:

No more than 6 circuits per manifold

That's a strange one - any obvious reason for this rule?

It isn't obvious, but I've tracked down the 1998 version of the regs that includes an explanation. That says to limit the circuits to 5 or 6 and to optimise the routing of loops to avoid concentrations of pipes, particularly in hallways, but to insulate them if necessary. Which I would take to mean to avoid condensation on parts of the floor that would, if pipes are too bunched up and not insulated, be a few °C cooler than the general floor temperature.

 

UFCH with cooling is pretty common France - apparently 1/3 of all new houses have it - and it has a long history, so their current regs (last updated in 2023) ought to be a good guide; I can spot a few things that have changed since 1998.

 

Edited May 22 by Mike

[richo106]

Hi all

 

I set my UFH temperature to 15 deg for cooling last heat wave and I monitored dew on the manifold and there was nothing. However when I turned it on Sunday for this hot period, I saw dew on my manifolds and the tiled floor felt very very slightly damp ish yesterday so I have upped the temp to 17 deg. This seemed ok until this evening when the manifolds had dew on them again albeit only very slightly.

 

how/what is the best way to monitor my dew point within the house?

 

is there anything I can integrate into my system retrospectively?

 

any advice/information greatly appreciated!