760 Long Road Crossing Dr. • Chesterfield MO 63005 800-899-1989 • www.cambridge-eng.com OPERATING CONDITIONS Operating Hours: 10 hrs/day 5 days/wk Design Temperature: 50° @ 0° Average Temperature: 67° Heating System: Cambridge Space Heaters 2 @ 900 MBH Thru wall mounting ACTUAL FUEL USE for the 1997-98 heating season (5,901 Heating Degree Days @ 67°) 2.7 Btu / HDD / sq.ft. CALCULATED OPERATING COST for normal heating season (6,256 Heating Degre

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