"dennis@home" wrote in message
k...

"Doctor Drivel" wrote in message
reenews.net...

"Christian McArdle" wrote in message
...
It doesn't require a separate zone. That is the best case of course,
but
it
can be taken off the existing rads.

Part L differs, however. A conservatory must have indepedent timing and
heating control for building regulations due to energy efficiency.

They have temp control. When the fan is off little heat floats out to
worth
worrying about. Time control? A plug-in timer into the fan heaters
socket.
If it brings in the fan heater when the main clock is off then there is
no
heat to the fan heater, then the internal temp stat holds off the fan.

For simiplicity's sake, you can probably get away with a zone valve off
the
existing house zone. The problem then is that the conservatory will
only
fire up if both it AND the house stat require heat.

You should fit the zone valve and a timer stat.

Best use a pump. These fancoil units need flow through them, and a
conventional system with a 6 metre pump may not be adequate.

Mine has been like that for 22 years now and has saved tons of energy over
that time.
Don't forget to lag the pipes.

Make sure the timerstat has a frost protection setting.