Like a lot of people in the city, my house has one of the old "octopus" gravity fed furnaces. It's working, but not in good shape, and nobody wants to work on them, so I'm planning on having it replaced as soon as the weather warms up...maybe get central air too while I'm at it, so I don't have to run two or three ACs during the summer.I know this is not going to be cheap; I'm going to need all new duct work, and the old ducts in the basement have asbestos that will need special handling during removal. On the plus side though, I won't eat $400 in gas every month during the winter.Does anyone have any recommendations for good contractors? I'd prefer to go with a company that has experience with this type of work.