Ventilation, chimney breast, internal wall insulation, air vent

[Mr Chibs]

I want to ventilate a room that has had internal wall insulation applied to it, and the chimney is not ventilated.

I was thinking of putting an air vent into the room (where old opening was) but they look a bit unsightly and was thinking it will allow cold air in, or will the hot air leaving not really allow this?

Can I put this vent on the outside of the house, as the brickwork behind the chimney is only a single course thick, or does it have to go on the inside?

The chimney pot has had a pepper pot ventilated cap on it already.

 

[foxhole]

You said , “the chimney is not ventilated” and “The chimney pot has had a pepper pot ventilated cap on it “

So which is it?

 

[Mr Chibs]

Chimney has a ventilated pot, but no air vent in the room.

 

[Bosswhite]

Chimney has a ventilated pot, but no air vent in the room.

You need a vent in the room , cold air in the chimney, warm air in the room one ends up with condensation in chimney ,Interior brick work of chimney soaks in moisture combines with Acids from soot then it leaches through chimney breast with a stain and damp that is impossible to get rid of .