In article s.net,
Doctor Evil wrote:
Dunno. Natural gas is a very clean
burning fuel

Compared to oil.

And you've snipped the other useful information. Are you actually brain
dead?

so doesn't leave much in
the way of deposits on the heat
exchanger, etc.

Doesn't it?

No. I'd suggest you look for yourself once rather than relying on adverts.

I'm continually amazed that you call yourself a pro when you have zero
practical experience.

--
*If you try to fail, and succeed, which have you done?

Dave Plowman London SW
To e-mail, change noise into sound.