Chimney & Fireplace

Internal or external vents on closed off chimney breast?

Anonymous user 03/03/2024 - 3.41 PM

Hi, I have a ground floor flat in a converted victorian semi-detached house which I am selling. The buyers survey has pointed out a lack of ventilation on the closed off chimneys and is insisting installing airbricks before the sale. The two flats above me have them installed on the inside so I suspect that mine may have been removed at some point. My question is should I have the vents installed on the inside or outside, my inclination is outside would be better? The walls are 13" thick, would it be the case of the builder removing a brick and drilling holes through to the flue and installing the air brick? How critical is the getting the correct height when working from outside? Many thanks.