Vent portable AC to sub floor void

Hi,

I would like to have some AC downstairs, in a cheap way that doesn’t involve coring big holes in brickwork. I was thinking of venting a portable DUAL hose AC into the sub floor void, where air would circulate ultimately through air bricks at the front and back of house. House is a hundred and a bit years old with suspended floor, not insulated, and about 50cm between the earth and floor joists (sleeper walls are honeycombed).

Would this be an awful idea? I was thinking it could make the timber in the suspended floor damp, but then it would only be used when it was very hot out so I’m not sure it would. I’d get a window kit but I’d like to be able to run it when I’m home if it gets too hot, for the sake of the dog and the fish.

Thanks!

Very bad idea
You'd create a damp environment under the floor with condensation and a massive damp issue
It might work with a solid pipe all the way to outside but even then it's risky

When I used a set up in a girlfriend's upstairs flat, I used a bit of laminated shelf cut to fit into the sash window and held by the sash. Then cut the hose into that.

The shelf was on edge, the depth was about 200cm, which became the height. I also added 2 loop type kitchen door handles to help get it in/out.

If you mean "run it when I am OUT" then make a system that locks the sash in the correct position

Ok thanks, I’ll look at fixing a mechanism into a window instead. Was trying to kid myself the damp wouldn’t be a problem due to air bricks!