In article
,
Tim+ wrote:
In any kind of structure there's still the risk of gas buildup if improperly
installed.

Hardly beyond the wit of man to design a lightweight well ventilated
weather-proof enclosure that would avoid the build up of any gas if
required.

Since you are obviously an expert on all things boilers, why the question
in the first place?

--
*ATHEISM IS A NON-PROPHET ORGANIZATION.

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