My sister has a combo boiler fitted in a cupboard under the stairs. can anyone tell me if there are any regulations to say that this is not allowed and if it is what are the regulations for this?
They are Combi boilers not combo, short for combination.
Check the manual for positions acceptable.
But as long as flue terminates in an acceptable position, enough space for servicing and any heat dissipation requirements it should be fine.
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