GRAPH FROM DATA COLLECTED IN 1979 EXPERIMENT *^ OUTSIDE AIR TEMPERATURES LEDGEND N= reading from one day in November D= reading from one day in December J= reading from one day in January F= reading from one day in February M= reading from one day in March A= reading from one day in April EXAMPLE At 15˚F outside the water temperature design is 165˚F. NOTE: The sloped line presents the supply water temperature expected requirement, based on the building original design. The letters present the actual supply water temperatures required by the coolest zone to keep that zone in the comfort zone. Comparison of original outdoor reset schedule to reset based on area of building with the greatest requirement for heating with that zone's call for heat coordinated with the cooling device for that zone. The cooling has to be shut down and the temperaure in the zone has to continue to drop before the heating supply water temperature is allowed to rise. As per calculations done by the owner on page 6.45, G. L. Roberts HS experienced a 44.9% reduction in gas use. AT G.L. ROBERTS H.S. IN OSHAWA, ONTARIO, CANADA APS 5.43G
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