Telephone Buildings Energy Conservation

The most cost and energy effective building energy saving measure tried has been Wide Band Temperature Control and Operation with no refrigeration provided when room ambient temperatures are below 80F (27C), and with no heating provided above 65F (18C), on a year around basis. Between these limits, the building is operated in a dynamic or transient mode. In many locales this can eliminate the energy use associated with simultaneous heating and cooling in different building zones, heating in the morning and cooling in the afternoon, short cycling of chillers and fans or furnaces, heating on cool summer days, and operation of refrigeration in mid-winter. Also, humidification and dehumidification loads are reduced. A smaller size environmental control system can be used to handle the reduced loads provided by these wider limits. Initial field trials have shown environmental control system annual energy savings of 30% of the previous year's usage even with override of these wider temperature limits during occupied periods.