A communicating air handler like the M Series Communicating Air Handler expertly links all of your HVAC system components through Trane’s ComfortLink^® II technology. That means, the M Series Communicating Air Handler can send and receive messages with other systems in the home like an air conditioner, heat pump, or furnace, to all work together at optimal performance. Enjoy the communication technology at work as you sit back and relax in your home.