On 28/05/2021 23:40, John Rumm wrote:
On 28/05/2021 13:22, T i m wrote:
On Fri, 28 May 2021 12:29:33 +0100, John Rumm
wrote:

snip

I guess the main attraction would be less space lost in a kitchen, and
less noise.

A disadvantage could be any heat lost from the boiler itself,
especially in the winter, if there was no need to heat the outbuilding
(other than for it's own frost protection)?

With a modern condenser there is very little heat lost from the boiler
itself (at least on gas ones anyway). You would be hard pushed on mine
to find any bit of it more than just slightly warm to the touch.

The only heating my Mum has in her kitchen is the boiler and the oven
/ stove if on and the flow / return pipes 'passing though' [1]. ;-)

Old conventional boilers would leak sever hundred watt into the room.


The class 2 flue blocks in my house went up through the bedroom above
the baxi bermuda back boiler and allowed the buider to fit a rad
only 2/3rds of the size of the one in the other identically-sized
bedroom. After I added just an inch of celotex on the inside of the
front (north) wall of this bedroom, even before I refitted the rad I
noticed that even in really cold weather, that the heat from these flue
blocks kept this bedroom comfortably warm.