Energy Savings by Wideband Temperature Control in Telephone Offices

Wideband Temperature Operation, or "wideband", significantly reduces the energy required for building cooling, heating, and fan operation by allowing temperatures to float over a wide range in telephone offices and by stopping air flow when neither cooling nor heating is required. Calculations using "wideband" indicate annual savings on environmental control operating costs of up to 28 percent for a 65 to 80°F (18-27°C) temperature range, as compared to a nominal 75°F (24°C) environment with continuous air movement. Test results from a carefully monitored trial held in a No. 1 ESS office in Birmingham, Alabama, indicate summertime energy savings as high as 40 percent for "wideband" and 45 percent if the temperature limits are extended to 60 to 85°F during unoccupied periods.