The porch is being built next week, the boiler isn't due to be moved for about a month, hence easy to put a ventilation brick in during construction...
Cheers, actually found that today as can't find the original installation book, however, cannot actually see requirements for air brick etc.... it does say on one page, "The appliance may be installed into an airing cupboard if required.See section "Air supply:"
I cannot find a section "air supply"
Might just fit an air brick anyway, can always be blocked off
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