Hi Stinky! What I think I will do is build a room, about 6X10 around the old chimney in the basement. There is a 6 inch hole in the chimney where the old furnace used to connect to it, and yeah I'm thinking of jamming a piece of duct right in there and connecting it to a cool tube (still not sure whether to go for the 600 or 1000 watt!). This does put my grow room within a few feet of the main breaker and fuse box to the house.....but they venting seems perfect here. The chimney does not do all the way to the outside....the top was chopped off so it currently vents to the unused side of my attic. Thinking of getting a 424 cfm inline fan connected to a 6" carbon filter which the heat/sweet stank will run through before being pushed up the chimney. One other thing, there is a raised stone slab that I think the old furnace used to sit on (about 4.5 x6), this is what I am thinking of using for the main flowering area. The rest of the floor on this side of the basement is concrete already. Only wish the breakers were a bit further away......