On 21 Dec, 17:26, "Dave Liquorice" wrote:
On Fri, 21 Dec 2007 08:04:11 -0800 (PST), Staffbull wrote:
with fitting a log burner can I get away with putting a S- steel pipe
up a way (couple of metres up the chimmeny? or do I have to have it
all the way to the pot, or do I have to have the chimeney re lined
(currently red brick)

I'm fairly sure the regs these days say you need a double skinned liner
all the way to the top.

I have also seen them with small boilers attached, so could do with
one of these to fit a rad in the downstairs and upstairs halls, I take
it I would need to plumb it in using an open tank system for
expansion?

Open vented more from safety than anything else, get a good fire going an
you'll be able to boil a cylinder of water in an evening... As you are
also looking at this being a backup system the thing will need to work
with gravity circulation not pumped or have any motorised valves. Gravity
means that a rad on the same floor as the boiler isn't likley to get
particulary warm let alone hot.

If you have an ordinary open vented CH system plumb it into the primary of
that via a Dunsley Neutraliser (or similar) and when you have power you
can heat your DHW and CH system saving oil. Without power you should still
have DHW and CH upstairs.

--
Cheers * * * * * * * * * * * * * * * * * * * * * *
Dave. * * * * * * * * * * * * * * * * * * * * * * pam is missing e-mail

We have a sealed system here on the C/H, so I take it the neutraliser
is out.

I'm thinking of fitting just the two rads in the halls (up and down)
and using a pump for circulation, hassle would be thinking of running
pipes all the way up to the roofspace for a vent/expansion tank.

I take it a double skinned liner isnt going to be cheap :-(

On Fri, 21 Dec 2007 10:46:30 -0800 (PST), Staffbull wrote:

We have a sealed system here on the C/H, so I take it the neutraliser
is out.

I don't think sealed per se prevents the use of a neutraliser but the
combi does as you have no stored ho****er, thus nowhere to dump the heat
from the boiler when there is no demand. Combis, 'orrible things no power
= no hot water or CH and a failed water supply = no water.

I'm thinking of fitting just the two rads in the halls (up and down)
and using a pump for circulation,

You don't want the pump, the power goes, no circulation in log burners
boiler, it boils (may explode or suffer damage), to prevent that you have
to shut the log burner down sharpish just when you want it as your backup
heat source...

The loop from boiler to upper heat sink (rad or cylinder) needs to be free
flowing without pumps or valves. You could pump another loop down to the
lower rad though.

hassle would be thinking of running pipes all the way up to the
roofspace for a vent/expansion tank.

22mm vent and 15mm feed are probably easier than a 28mm gravity loop from
the boiler to the upper rad.

I take it a double skinned liner isnt going to be cheap :-(

Yep, but I'm not expert on what the regs say is required. Have a dig about
the web.

--
Cheers
Dave. pam is missing e-mail

Staffbull wrote:
On 21 Dec, 17:26, "Dave Liquorice" wrote:
On Fri, 21 Dec 2007 08:04:11 -0800 (PST), Staffbull wrote:
with fitting a log burner can I get away with putting a S- steel pipe
up a way (couple of metres up the chimmeny? or do I have to have it
all the way to the pot, or do I have to have the chimeney re lined
(currently red brick)
I'm fairly sure the regs these days say you need a double skinned liner
all the way to the top.

I have also seen them with small boilers attached, so could do with
one of these to fit a rad in the downstairs and upstairs halls, I take
it I would need to plumb it in using an open tank system for
expansion?
Open vented more from safety than anything else, get a good fire going an
you'll be able to boil a cylinder of water in an evening... As you are
also looking at this being a backup system the thing will need to work
with gravity circulation not pumped or have any motorised valves. Gravity
means that a rad on the same floor as the boiler isn't likley to get
particulary warm let alone hot.

If you have an ordinary open vented CH system plumb it into the primary of
that via a Dunsley Neutraliser (or similar) and when you have power you
can heat your DHW and CH system saving oil. Without power you should still
have DHW and CH upstairs.

--
Cheers � � � � � � � � � � � � � � � � � � � � � �
Dave. � � � � � � � � � � � � � � � � � � � � � � pam is missing e-mail

We have a sealed system here on the C/H, so I take it the neutraliser
is out.

I'm thinking of fitting just the two rads in the halls (up and down)
and using a pump for circulation, hassle would be thinking of running
pipes all the way up to the roofspace for a vent/expansion tank.

I take it a double skinned liner isnt going to be cheap :-(

About a grand. With fitting.
That sort of order,