John Armstrong wrote:

On Fri, 12 Dec 2003 16:05:30 +0000, The Natural Philosopher wrote:


BillP wrote:



If the room stat has been removed, the installation does not meet the
minimum requirements of Part L building regs.


Can you show me exactly where this is stated?

My Part L building regulations have no mention of use of thermostats
beyond stating thet either TRV's or other thermostats should be used.


How about page 16, paragraph 1.41
"b) Where it is proposed to effect control by
thermostatic radiator valves, a room thermostat
(or other device such as a flow switch) should
also be provided to switch off the boiler when
there is no demand for heating or hot water."


Well every boiler I have ever seen comes with a thermostatic switch to
do just that.

I can't find that in my slightly older (2000) building regs tho.



Also page 19
"d) Boiler and hot water storage controls.
So that replacement boilers (other than solid
fuel boilers) and hot water vessels can achieve
reasonable seasonal efficiency, the work may
also need to include replacement of the time
switch or programmer, room thermostat, and
hot water vessel thermostat, and provision of a
boiler interlock and fully pumped circulation.
Section 3 of GPG 302 34 gives more advice on
how this can be done."


Yes, but it doesn't say you have to set up a system of two suites of
thermostats essentially fighting each other.