I've been told I need better underfloor ventilation (there's no ventilation at the back of the house, just the front).
We are doing some refurbishments so it's as good a time as any to rip the floor up and put a couple of snorkel vents in the back wall.
And i'm blocking up a fireplace and apparently supposed to vent the chimney. As it goes against the grain to send hard earned warm air up the chimney I thought of venting the space under the floor into the unused chimney instead.
It seems like a no brainer to me.