I've had an old gas fire removed, and don't plan on replacing it, but currently the entire flue is intact. It's a bungalow, and the flue is on an internal wall.
It consists of a ridge terminal, then in the loft, a vertical grey/blue pipe, with a 90 degree bend at the bottom into a concrete cube at joist level, before going presumably another 90 degrees and entering rectangular pre-cast flue blocks.
I can see three options:
a) remove the ridge terminal and loft pipes, and seal the top and bottom of the flue completely.
b) leave everything in place, and install a vent at the bottom of the flue, allowing free flow of air from the bottom to the roof ridge.
c) remove everything and replace the flue blocks with regular blockwork (seems over the top).
One other point is that there is no other additional ventilation in the room (not even trickle vents), and so I'm leaning towards (b). Relative Humidity levels are currently 50-55% @18C, with the property unoccupied and all windows shut for the majority of the day. And this is with the flue fully open, having removed the fire.
It consists of a ridge terminal, then in the loft, a vertical grey/blue pipe, with a 90 degree bend at the bottom into a concrete cube at joist level, before going presumably another 90 degrees and entering rectangular pre-cast flue blocks.
I can see three options:
a) remove the ridge terminal and loft pipes, and seal the top and bottom of the flue completely.
b) leave everything in place, and install a vent at the bottom of the flue, allowing free flow of air from the bottom to the roof ridge.
c) remove everything and replace the flue blocks with regular blockwork (seems over the top).
One other point is that there is no other additional ventilation in the room (not even trickle vents), and so I'm leaning towards (b). Relative Humidity levels are currently 50-55% @18C, with the property unoccupied and all windows shut for the majority of the day. And this is with the flue fully open, having removed the fire.
