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Lowering an extractor fan vent by a small amount

Posted: Sat Feb 24, 2018 8:25 am
by R.E.S
Hi All,

Trying to replace an extractor fan in the bathroom. The old one was very close to the ceiling and the new one is a little larger so i need to lower the vent through the brick by an inch or so.

What's the best way to do this? Would I get away with just chiseling or should I get a proper hole cutter?

Thanks for the input....