We have a Carrier 4 Ton AC/Heat unit with Puron. We had it installed by Senica Air Brand new. It is currently cooling and heating a 4 bedroon 28x64 Ft. doublewide mobile home. It is also a 5 Star Energy Saver Model. There are 2 years remaining on the original warranty and we recently had it serviced. Call anytime ( Will deliver within a 20 mile distance.