The biggest cost is in the duct work. A property with duct work will cost a lot less than one that you have to install duct work. There is a lot of construct work involved with installing the duct work. I put in a A/C system approx 3 years ago with duct work. It took about 2 weeks and because of the way my house was built I had to have a 3 zone system put in. It cost approx 20k for a 2700 sqft house. Like Diane said, best thing is get some estimates. I suggest if you do need duct work find a contractor in the sheet metal business that does duct work and not an A/C contractor. The A/C contractors were terrible about coming out to get an estimate because they were always canceling to go on emergency service calls. A sheet metal contractor doesn't have that problem.

Mon May 12 2008, 19:29

It all depends upon what manufacturer you choose, size, size of the home, etc. If you are thinking about replacing both the condenser usually located outside and the blower or furnace usually located inside then you could expect to pay approx. $3500. - $5000. for a 4-5 ton system. If your home needs to be ducted then of course that will add to your cost. Check with a local A/C contractor for more specific pricing. Good luck!

Mon May 12 2008, 18:53