If I need a new furnace, I'm sure they will want to sell me a new AC at the same time, and I could probably use one.
Does one set of guys install the furnace and the evaporator, and then another set come to install the condenser and to hook the AC up?
If you wanted to do the furnace first and wait a few weeks or months to finish the AC, would they likely charge extra for that? Would they price it as two separate jobs?
In another thread, I read again how important the AC installation is, and to check out the who is going to do it, so I could use the time. The furnace might end up being a semi-emergency buy, but the AC won't.