Hi all.

Our bathroom is on the north side of the house, next to our nearly
three year old sons room. They both get very cold compared to the
rest of the house so I thought I might give them an independant
zone(s).

It's a 60's three bed terrace with a new WB Greenstar condensing
boiler. No cylinder, all HW is a direct feed from the boiler on
demand. A 22mm plastic pipe forms a loop under the boards between
ground and first floors with 15mm spurs off feeding rads with TRV's
fitted. No TRV in the living room.

Our living room is open plan, so the stairwell and hall on the first
floor share the same air volume. The thermostat is currently on the
wall downstairs in this living room, near the stairs.

If I want to bath our son it's usually cold in there, because the
heating was shut off when the living room warmed up. So currently I
have to turn the thermostat up higher than we want to get the bathroom
warm. If you see what I mean!

Most of the day the bathroom and his room are empty anyway, so it
makes sense to me to zone them off. The other two bedrooms are used a
fair bit and are warmer anyway, so I'd prefer to keep them in the main
zone.

My questions a

What problems can anyone see in this?

Where should the thermostat go? Bedroom or bathroom?

Or should / could they be two independant zones?

Currently most of the piping is under the floorboards. Can a zone
valve be put there or should I put it near the boiler (the only other
accessible place) and box it in. I think I know the answer to this
one really, but...

I've looked at the UKDIY FAQ, but although mentioning valves its not
very specific. Got a better zoning tutorial or FAQ?

OK, many thanks and keep that hammer off your fingers!

--
Regards from Mike Barnard
South Coast, UK.

[To reply by email remove ".trousers" spamtrap from email address]

"Mike Barnard" wrote in message
...

My questions a

What problems can anyone see in this?

Should work fine


Where should the thermostat go? Bedroom or bathroom?

Bedroom. Thermostat has mains in it so best not in bathroom. And I'd hate
to see what steam does to the electronics :-)


Or should / could they be two independant zones?
Don't think that's needed. If you can't get the two zones right then put a
TRV on one.


Currently most of the piping is under the floorboards. Can a zone
valve be put there or should I put it near the boiler (the only other
accessible place) and box it in. I think I know the answer to this
one really, but...

Either is common. Where is the existing one ? It will need wiring into
this to fire the boiler and pump anyway.

"Mike Barnard" wrote in message
...
Hi all.

Our bathroom is on the north side of the house, next to our nearly
three year old sons room. They both get very cold compared to the
rest of the house so I thought I might give them an independant
zone(s).

It's a 60's three bed terrace with a new WB Greenstar condensing
boiler. No cylinder, all HW is a direct feed from the boiler on
demand. A 22mm plastic pipe forms a loop under the boards between
ground and first floors with 15mm spurs off feeding rads with TRV's
fitted. No TRV in the living room.

Our living room is open plan, so the stairwell and hall on the first
floor share the same air volume. The thermostat is currently on the
wall downstairs in this living room, near the stairs.

If I want to bath our son it's usually cold in there, because the
heating was shut off when the living room warmed up. So currently I
have to turn the thermostat up higher than we want to get the bathroom
warm. If you see what I mean!

Most of the day the bathroom and his room are empty anyway, so it
makes sense to me to zone them off. The other two bedrooms are used a
fair bit and are warmer anyway, so I'd prefer to keep them in the main
zone.

My questions a

What problems can anyone see in this?

None, a good idea. In summer you can turn off the bedroom rad and have the
heating do the bathhroom heated towel rail.

Where should the thermostat go? Bedroom or bathroom?

Bedroom.

Or should / could they be two independant zones?

You can have axone for each room if you like and have more precise
temperature and timing control, but a bit OTT.

Currently most of the piping is under the floorboards. Can a zone
valve be put there or should I put it near the boiler (the only other
accessible place) and box it in. I think I know the answer to this
one really, but...

You will need a valve for each zone, or a one group member has done, have a
3-way mid position valve to accommodate pump overrun. This is a bit more
involved in the wiring.

Have the valve(s) boxed in with removable panels, for maintenance access. Do
not have them inaccessible under floors. If there is a leak you also have
problems too.

I've looked at the UKDIY FAQ, but although mentioning valves its not
very specific. Got a better zoning tutorial or FAQ?

OK, many thanks and keep that hammer off your fingers!

Some use the hammer on their heads, that is plain to see.



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