In article ,
gastec writes:

Ive been informed that new central heating boilers below a certain
efficiency rating are being outlawed in the UK due to enviromental
issues and also because of an expected energy crisis..

Am i correct in saying that Warm Air Units at this time are not being
classified equally with Wet systems and will therfore continue to be
installed for some years to come..i heard 2 years in england??

There is no significant level of installation in UK domestic
premises, and hasn't been for years. They got to be slightly
popular in houses built around 1968-1970, but such systems will
no longer be in use. I lived in such a house in 1984, and it
was one of the very few on the estate which still had the WAU.
Although I was renting, I serviced it a couple of times, and
spares were easy to obtain back then at least.

I liked the fast warm-up, but it was a real problem for the
others in the house -- dryness was a disaster for a contact
lense wearer, and the dust (even with filter) was a problem
for someone else who was constantly sneezing when it was on.
The unit and ducting were in the middle of the house, which
left the external walls cold (where you would have put the
radiators in a wet system), and rooms which didn't reach
the centre of the house got no direct heating at all.
A few years after I moved out, the landlord pretty much had
to ditch it because no one would service them anymore.

I Wonder if the cost of spare parts shall increase as Warm Air Units
decline in the UK

The decline was 30 years ago, but there was barely a noticable
rise before it in any case.

--
Andrew Gabriel