Jethro pretended :
1) anyone familiar with the above, or can suggest an equivalent ...
2) Regarding fitting. Would I be correct in assuming the best way
forward would be to arrange to physically fit the thing (cutting
space, etc) and then call a gas engineer to complete the gas bits ? Or
is there some logic to getting the thing gassed up, and *then* fitting
it ? (Can't see it myself) ....

These things usually just plug into a wall mounted gas outlet socket.

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk