At present I have my CH Wireless Thermostat situated in the Hall . I
am about to replace the hall rad and am wondering if this is the best
place for the thermostat.
Is there an ideal place to fit it and what are the reasons for
fitting it in one area as opposed to another ?
I know about not having a TRV on the rad(s) in the room where the
thermostat is .I have one rad in the hall,one in each of two bedrooms
and two in the living room .One is in the kitchen but will soon be
either moved or done away with altogether as it doesn't really get
cold .

On Wed, 12 Nov 2008 13:24:45 +0000 someone who may be
wrote this:-

At present I have my CH Wireless Thermostat situated in the Hall . I
am about to replace the hall rad and am wondering if this is the best
place for the thermostat.
Is there an ideal place to fit it

Possibly, though where is ideal depends on the building and its
orientation.

and what are the reasons for
fitting it in one area as opposed to another ?

Some pointers:

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

On Nov 12, 1:42*pm, David Hansen
wrote:
On Wed, 12 Nov 2008 13:24:45 +0000 someone who may be
wrote this:-

At present I have my CH Wireless Thermostat situated in the Hall . I
am about to replace the hall rad and am wondering if this is the best
place for the thermostat.
Is there an ideal place to fit it

Possibly, though where is ideal depends on the building and its
orientation.

and what are the reasons for
fitting it in one area as opposed to another ?

Some pointers:

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.


before TRVs I woudl have said that you put the thermostat at the
place where you want the temperature to be most constant - in the
living room for example.

But with TRVs doing the temperature control in each room why do people
have thermostats any more? If it's to turn the heating system on in
cold weather then perhaps it should actully be outside!

Robert

"RobertL" wrote in message
...
On Nov 12, 1:42 pm, David Hansen
wrote:
On Wed, 12 Nov 2008 13:24:45 +0000 someone who may be
wrote this:-

At present I have my CH Wireless Thermostat situated in the Hall . I
am about to replace the hall rad and am wondering if this is the best
place for the thermostat.
Is there an ideal place to fit it

Possibly, though where is ideal depends on the building and its
orientation.

and what are the reasons for
fitting it in one area as opposed to another ?

Some pointers:

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.


But with TRVs doing the temperature control in each room why do people
have thermostats any more? If it's to turn the heating system on in
cold weather then perhaps it should actully be outside!

Robert

Possibly because a thermostat 'tells' the boiler when it needs to fire
up/down, a TRV closes the flow to the rad.

Don.

Don wrote :
But with TRVs doing the temperature control in each room why do people
have thermostats any more? If it's to turn the heating system on in
cold weather then perhaps it should actully be outside!

Robert

Possibly because a thermostat 'tells' the boiler when it needs to fire
up/down, a TRV closes the flow to the rad.

Perhaps a need for a flow through the boiler sensing to turn it off,
combined with a thermostat used to turn it back on?

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

"RobertL" wrote in message
...
On Nov 12, 1:42 pm, David Hansen
wrote:
On Wed, 12 Nov 2008 13:24:45 +0000 someone who may be
wrote this:-

At present I have my CH Wireless Thermostat situated in the Hall . I
am about to replace the hall rad and am wondering if this is the best
place for the thermostat.
Is there an ideal place to fit it

Possibly, though where is ideal depends on the building and its
orientation.

and what are the reasons for
fitting it in one area as opposed to another ?

Some pointers:

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.


before TRVs I woudl have said that you put the thermostat at the
place where you want the temperature to be most constant - in the
living room for example.

But with TRVs doing the temperature control in each room why do people
have thermostats any more? If it's to turn the heating system on in
cold weather then perhaps it should actully be outside!

given the crude control systems on CH these days it wouldn't work very well.
It would tell the boiler to fire and circulate the water even though it was
warm inside but cool outside.
The best place to fit it is in the warmest area.
If it isn't in the warmest area the heating won't turn on even though the
area you want warm has cooled below the desired temp.

On Wed, 12 Nov 2008 18:30:59 -0000, "dennis@home"
wrote:



"RobertL" wrote in message
...
On Nov 12, 1:42 pm, David Hansen
wrote:
On Wed, 12 Nov 2008 13:24:45 +0000 someone who may be
wrote this:-

At present I have my CH Wireless Thermostat situated in the Hall . I
am about to replace the hall rad and am wondering if this is the best
place for the thermostat.
Is there an ideal place to fit it

Possibly, though where is ideal depends on the building and its
orientation.

and what are the reasons for
fitting it in one area as opposed to another ?

Some pointers:

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.


before TRVs I woudl have said that you put the thermostat at the
place where you want the temperature to be most constant - in the
living room for example.

But with TRVs doing the temperature control in each room why do people
have thermostats any more? If it's to turn the heating system on in
cold weather then perhaps it should actully be outside!

given the crude control systems on CH these days it wouldn't work very well.
It would tell the boiler to fire and circulate the water even though it was
warm inside but cool outside.
The best place to fit it is in the warmest area.
If it isn't in the warmest area the heating won't turn on even though the
area you want warm has cooled below the desired temp.

Eh ?????

dennis@home wrote:
"RobertL" wrote in message
...
On Nov 12, 1:42 pm, David Hansen
wrote:
On Wed, 12 Nov 2008 13:24:45 +0000 someone who may be
wrote this:-

At present I have my CH Wireless Thermostat situated in the Hall .
I am about to replace the hall rad and am wondering if this is the
best place for the thermostat.
Is there an ideal place to fit it

snipped some stuff

given the crude control systems on CH these days it wouldn't work
very well. It would tell the boiler to fire and circulate the water
even though it was warm inside but cool outside.
The best place to fit it is in the warmest area.
If it isn't in the warmest area the heating won't turn on even though
the area you want warm has cooled below the desired temp.

What on earth are you on about?

In an effort to cut our gas bill I'm trying to get the family used to having
our programmer/room stat set at 20C instead of previous years where it's
been normal to have it at around 22-23C. The condensing combi boiler is up
in the loft and the guy who installed the system (which was already in when
we bought the house last year) installed the room stat in the living room.

A sort of an unintended side-effect of the desire to cut our bills is that
the living room seems to reach the required temperature of 20C quite easily
and the stat then shuts off the boiler, resulting in the rest of the house
being cold - or at least colder than son in his bedroom doing his homework,
daughter in her bedroom, and anyone wanting a shower, would like it to be.

That's the effect of fitting it in the warmest area - I'm moving our stat
into the hallway.

John

"John" wrote in message
...

The best place to fit it is in the warmest area.
If it isn't in the warmest area the heating won't turn on even though
the area you want warm has cooled below the desired temp.

What on earth are you on about?

If you put it in say the hall and set it to a sensible temp for a hall say
15C the the heating in the house will not come on if its 16C pretty cold for
a lounge or bathroom.


In an effort to cut our gas bill I'm trying to get the family used to
having
our programmer/room stat set at 20C instead of previous years where it's
been normal to have it at around 22-23C. The condensing combi boiler is up
in the loft and the guy who installed the system (which was already in
when
we bought the house last year) installed the room stat in the living room.

A sort of an unintended side-effect of the desire to cut our bills is that
the living room seems to reach the required temperature of 20C quite
easily
and the stat then shuts off the boiler, resulting in the rest of the house
being cold - or at least colder than son in his bedroom doing his
homework,
daughter in her bedroom, and anyone wanting a shower, would like it to be.


That's the effect of fitting it in the warmest area - I'm moving our stat
into the hallway.

That is caused by the system being unbalanced.
You need to adjust the output of the lounge rad downwards so it warms
slower.

Moving the stat or lowering the lounge output will increase your bills as
the rest of the house will be warmer, but that is what you want.

The message
from "John" contains these words:

If it isn't in the warmest area the heating won't turn on even though
the area you want warm has cooled below the desired temp.

What on earth are you on about?

Does seem to be complete nonsense.

In an effort to cut our gas bill I'm trying to get the family used to having
our programmer/room stat set at 20C instead of previous years where it's
been normal to have it at around 22-23C. The condensing combi boiler is up
in the loft and the guy who installed the system (which was already in when
we bought the house last year) installed the room stat in the living room.

A sort of an unintended side-effect of the desire to cut our bills is that
the living room seems to reach the required temperature of 20C quite easily
and the stat then shuts off the boiler, resulting in the rest of the house
being cold - or at least colder than son in his bedroom doing his homework,
daughter in her bedroom, and anyone wanting a shower, would like it to be.

That's the effect of fitting it in the warmest area - I'm moving our stat
into the hallway.

But you are barking up the wrong tree as well. Your heating problem
stems from the room where the stat is heating up faster than the rest of
the house. It matters very little that that is the room you want to be
the warmest in the house ( but see below).

What you need to do is balance the heating system so every room warms up
in approximately the same time. It is likely that the warmest room is
also the room that will have the fastest temperature drop but if that is
not the case then the system needs to be set up so the rest of the house
actually warms up faster than the warmest room otherwise the rest of the
house will gradually drift colder as the thermostat governs the
temperature in the warmest room.

Putting the stat in the hall is the favourite trick of professional
installers as it is generally the easiest place and, as one installer
explained to me, it is conveniently placed to turn the heating down if
you go out. However the hall may be the worst possible place to put the
stat as the temperature drop in the hall is likely to be slower than
that in the living room so the boiler may often not be firing when the
living room actually needs heat except for the relatively rare times
when there is constant traffic in and out of the house.

--
Roger Chapman

On Wed, 12 Nov 2008 08:15:48 -0800 (PST) someone who may be RobertL
wrote this:-

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.


before TRVs I woudl have said that you put the thermostat at the
place where you want the temperature to be most constant - in the
living room for example.

Conflicts with my first point. If there is a coal/wood/gas/electric
fire then the rest of the house may well be cold while the living
room is at the right temperature.

But with TRVs doing the temperature control in each room why do people
have thermostats any more?

Imagine a heating system with all TRVs and just a time clock, the
pump could spend some considerable time pumping against a closed
head. Fit a bypass to the system and the boiler is likely to short
cycle when the house is near temperature. Add a thermostat in the
place which cools down most rapidly and these problems are solved.
There are more sophisticated ways of doing all this, but it adds
cost.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

Some pointers:

1) don't have it in a room with supplementary heating (including a
kitchen)

2) don't have it in a room with excessive solar gains

3) have it somewhere you want heated all the time (avoid a little
used dining room)

A hall or north facing bedroom can be good places.

That just about rules out anywhere in our house
Living room, dining area and kitchen and hall/landing are essentially open
plan. (no doors just arches)
No windows (except a toilet) face north. Double aspect lounge section has
large glass patio doors facing West and collecting a lot of sun after mid
day..
Still can't complain as we are probably in one of the warmest places in the
UK though sometimes fairly breezy.
Oh! and it's upside down..The four bedrooms are downstairs.
Michael in West Sussex

On Wed, 12 Nov 2008 20:05:11 -0000 someone who may be "Michael
Shergold" wrote this:-

That just about rules out anywhere in our house

Then you need a more complicated setup with individual controls for
parts of the house.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54