Zoned Forced Air Heating

The RAD control system was tested in the Canadian Centre for Housing Technology (CCHT) twin-house facility during the late heating season in April 2005, and during the cooling season in August 2005. 

The RAD control system by RAD Innovations Inc. consists of vacuum activated registers that direct forced air heating or cooling to individual zones when it is required. In total the CCHT Experimental House was divided into 9 different zones, each controlled by an independent thermostat. Different control strategies were employed in each zone, to conserve energy in unused or unoccupied rooms, while keeping occupied rooms at approximately 21°C. The RAD control system was compared to a single central thermostat control in the CCHT Control House, set to a constant 21°C. Both houses were heated by a high efficiency single-stage condensing gas furnace, operated without continuous circulation. The resultant furnace energy consumption, room temperatures, duct temperatures and duct airflow were measured and compared. 

Report: Confidential Client Report.