The situation: We live in a one bedroom + den (rental). We're using the den as a second bedroom, as we're a family of four and that's what we can afford right now. The den has no windows, however, and so gets very warm.
The project: We have a small 8,000 btu air conditioner that I would like to vent out the window in the living room. We're in a long-term rental situation, and our landlords are fine with us doing minor projects. What I'm thinking is cutting a hole in the ceiling of the den, and using flexible vinyl ducting run through the ceiling cavity (which I have access to). The cavity is just slightly too small to crawl through, so I'm wondering a couple things:
Is there a problem venting an air conditioner through roughly 30' of ducting?
Would would be the easiest way of fishing the ducting through the cavity?
Are there any major problems that I'm not considering, or any simpler solutions? It's not possible to vent to the roof, and I'm wary about venting into the ceiling cavity. It's a straight shot from the den to the window.
Thanks for any help you can offer!