Tri County Climate Control completely replaced our entire heating ventilation and air conditioning system. They also re-zoned our house and created three zones with three different thermostats. Everything is brand new with this system from the furnace to the ducting and air dampeners. This was a very big job! They did everything that needed to be done for this replacement and they did it very well! We have been using it for a while now and are satisfied with the system and no complaints thus far.