On Wed, 27 Jun 2007 14:14:24 +0100, Mike Barnard wrote:

Hi all.

Any CH design guru's aid me in my small dilemma please?

I have a 1960's mid terrace Wimpy (spit) three bed house. It had no
CH at all untill a couple of years ago when I put a new combi boiler
in [1]. I also put a couple of rads in. It was not a complete system,
DHW was what I needed mostly. Now the time has finally come to finish
the job.

The dilemma is whether to zone off the rear two rooms upstairs. The
bathroom and bedroom 2 are north facing and in winter they can be much
colder than the rest of the house. The thremostat and timing controls
are in the open plan lounge; see description below. If the lounge is
nice and toasty, then the thermostat will not be telling the boiler to
fire up. Therefore the water in the pipes will not be heated and
under circulation. No matter how far the TRV's in these rooms open
they will recieve no heat.

Thoughts:

If I put a zone in to supply heat for these rooms its a lot more
pipework and electrics to try and hide.

If I'm doing these two rooms why not all of them.

If I do all of them am I going to lose heat when the upstairs is off
and downstairs is leaching up?

What else?

Layout is...

Front is facing south, rear north. 1 mile from the sea.

Front door opens directly to the living room.

Ground floor split into just two rooms:
- a living room to the front
- a dining room / kitchen to the rear

Open staircase from the living room to a landing.

Off the landing at the back is the bathroom and bedroom 2, (my 5yo
sons.)

Off the landing to the front is bedroom 1 (ours) and bedroom 3 (used
as a study.)

Radiator with no TRV in the lounge as the controls are here by the
stairs.
Radiators with TRV's in all other rooms.
Heated towel rail in bathroom.







[1] Worcester Bosch Greenstar R35HE Plus. What a mouthful. As a
part of putting in a new kitchen, losing an airing cupboard and a wall
and associated HW tank and plumbing.


It's probably not worth zoning. What you need is to make sure that the hot
area have TRV's and the coldest area doesn't.

If you can make sure the hall way is the coolest area then you can have
the thermostat there where it is convenient to put on/off when you come
in/go out.



--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
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