Just finished a system with the ABT zone control system. It is pretty cool. You can break up individual zones you want to control seperately or have one shut off or come on at different times or at your command on the keyfob. This is a completely wireless system, so there is no internal wiring at the panel or in the house that needs to be done. Range of approximately 500'. They are producing a sequencer for these units. That will make linking multiple receivers on a job a snap.