We've recently moved into a 120 year old house and there are a few mysteries that I would still like to get to the bottom of.
We have a chimney block that has 6 individual chimneys in it, which is shared with next door. In our bedroom (actually on the ground floor) there's an airbrick into a chimney that I thought was disused. That is until our neighbour's boiler started up and I realise that there is a flue running up the chimney for next door's boiler.
This wakes us up when it starts up at 5am! I've temporarily taped some plywood over the vent and it makes a big difference to the noise. Do you think it's a bad idea to permanently block up this vent? I assume the chimney is sealed at the top, allowing only the boiler flue to exit. I think this is the only vent into the chimney, and the only other place it's possible to vent it would be in the lounge, which is also undesirable.
Any advice gratefully received.
Thanks, Dave.