The supply of heating and cooling energy to each space-conditioning zone or dwelling unit shall be controlled by an individual thermostatic control that responds to temperature within the zone and that meets the applicable requirements of Section A184.108.40.206.
Exception: An independent perimeter heating or cooling system may serve more than one zone without individual thermostatic controls if:
- All zones are also served by an interior cooling system;
- The perimeter system is designed solely to offset envelope heat losses or gains;
- The perimeter system has at least one thermostatic control for each building orientation of 50 feet or more; and
- The perimeter system is controlled by at least one thermostat located in one of the zones served by the system.