Depends how big the vent is, what rating the stove is. Usually a 110mm hole is enough (same size as std tumble dryer vent) but your installer should be able to verify that.
Depends how big the vent is, what rating the stove is. Usually a 110mm hole is enough (same size as std tumble dryer vent) but your installer should be able to verify that.
Stick a Building Notice in and see what happens. You'll have to demonstrate competence and compliance with whatever regulations apply, if you follow the scenarios laid out in the relevant Approved Documents then the job will be deemed to comply.
EDIT Just remembered you're in NI, no idea if the same rules apply.
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