What is the average price to install a replacement 13 seer 4 ton central air conditioner unit?
It should cost about $4000. It will vary based on the brand of unit and the dealer. If the dealer is slow, the price will go down. If the dealer is busy, the price will go way up. The best thing to do is to compare brands and shop around. The best way to compare brands is to go to http://www.hvac-for-beginners.com/air-conditioner-ratings.