Hi All,

We plan to replace the boiler in a property we just bought. The old
boiler is currently in the small kitchen. Attached to the kitchen is a
small lean too used mainly as a utility room. To free up space in the
kitchen we plan to move the boiler to an external wall but within this
lean too and have the flue coming vertically out the roof of the lean
too. The roof of the lean too is comprised of plastic sheets (I think
they are polycarbonate sheets, it looks like them).

We have got quotes from two plumbers, one saying we can go vertically
out the roof and another saying we can't because it's plastic, it
would melt so we must put the flue horizontal to the boiler out the
adjacent window. Also the adjacent single glass window needs to be
changed to dbl glazing.

Any advice on who is right? If we can go vertically what do we need to
buy for the roof to keep a waterproof seal.


Cheers
Ado

On Thu, 31 May 2007 05:51:39 -0700, ado wrote:

We have got quotes from two plumbers, one saying we can go vertically
out the roof and another saying we can't because it's plastic, it
would melt so we must put the flue horizontal to the boiler out the
adjacent window. Also the adjacent single glass window needs to be
changed to dbl glazing.

The flue won't get hot since even the inside compartment is only designed
to take warm and wet gas and is itself made of plastic so there should be
no problem with going through the polycarb roof. However the boiler &
flue manufacturer's instructions are final so if there's nothing specific
in the vertical flue kit installation manual then call the manufacturer
for advice.

As for changing a sg window to dg that installer is clearly talking out of
his botty.

--
John Stumbles

Bitwise, byte foolish

John Stumbles wrote:

On Thu, 31 May 2007 05:51:39 -0700, ado wrote:

We have got quotes from two plumbers, one saying we can go vertically
out the roof and another saying we can't because it's plastic, it
would melt so we must put the flue horizontal to the boiler out the
adjacent window. Also the adjacent single glass window needs to be
changed to dbl glazing.

The flue won't get hot since even the inside compartment is only designed
to take warm and wet gas and is itself made of plastic so there should be
no problem with going through the polycarb roof. However the boiler &
flue manufacturer's instructions are final so if there's nothing specific
in the vertical flue kit installation manual then call the manufacturer
for advice.

As for changing a sg window to dg that installer is clearly talking out of
his botty.

Especially since you would be reducing the ventilation if you did so. He
might have been thinking about condensation I suppose.

Peter
--
Add my middle initial to email me. It has become attached to a country
www.the-brights.net

On Fri, 01 Jun 2007 13:02:39 +0000, Peter Ashby wrote:

Especially since you would be reducing the ventilation if you did so. He
might have been thinking about condensation I suppose.

How would changing single to double glazing affect ventilation?


--
John Stumbles

Pessimists are never disappointed

John Stumbles wrote:

On Fri, 01 Jun 2007 13:02:39 +0000, Peter Ashby wrote:

Especially since you would be reducing the ventilation if you did so. He
might have been thinking about condensation I suppose.

How would changing single to double glazing affect ventilation?

A single glazing sash is thinner than that required for double as a
general rule so easy ingress of cold air.

Peter
--
Add my middle initial to email me. It has become attached to a country
www.the-brights.net