Hi

This might be a naive question but I'm no expert in these systems and was
wondering if any one can help.

I rent a house which has an under floor heating system which is water
based. The system is set up with a Vaillant combi-boiler which supplies
hot water to a circuit for the taps and a circuit for the underfloor
heating. Both these circuits disappear into a small storage tank so that
it works in a semi-combi style, filling the storage tank first.

In the summer we turn off the heating for the floor circuit on the boiler
but the floor nearest the boiler (kitchen area) still gets v. hot from
the residual heating effect of the hot water ciruit(well this is my idea
of how the floor is getting hot).

This gets pretty uncomfortable when the downstairs is open plan and the
average temp is +30oC (French Alps, not Sarf London). What are peoples
opinions on just closing the water circuits that are feeding the
underfloor heating system (there are 4 pipes going into and out of the
wall below floor level, with taps on the inlets). Is this likely to cause
any damage to the boiler, storage tanks or underfloor heating? Like I say
I have no experience of these systems so any opinions would be gratefully
received.

Cheers

D.