"dennis@home" wrote in message
. uk...

"Doctor Drivel" wrote in message
reenews.net...

It extracts even more latent heat from the flue of a condensing boiler.
They claim, with some independent validation, that a "condensing" boiler
can save 30% of its heating bills. There are no moving parts.

They claim that a combi can deliver 50% more water flow for the same
input - so a 12 litres per min job will be 18 litres, a big hype that
fills a bath pretty fast instead of a leisurely fill.

As a condensing boiler is supposed to be 90+% efficient how can they
extract another 30% from the waste?

There is:
Sensible heat (from the flames)
Latent heat(from the flues gasses).

30% extra from the latent heat? The article does say 30% more efficient.
The editor of HVR magazien says in his leader:

"the product independently tested by GasTec and it offers DHW improvements
of more than 30% when compared with ordinary SEEDBUK A-rated boilers.
Forget all this energy rating stuff, anyone who offers me a saving of 30% of
my heating bill is OK in my book, especially as British Gas has just put up
its prices again." "I believe that this is, for now, the closest to a
quantum leap".

BTW, the condensing range currently goes up to 109%. The 100% range only
takes in account senible heat.

Maybe they are lying, maybe the boiler manufacturers are lying, but they
can't both be true.

Viessmann collaborated with them on a job in Plymouth. A company like them
does not chase lost causes or pseudo engineering.