ASHRAE Heat Loss Calculations
One Uninsulated 4” Valve is Comparable to 8.5’ of Exposed Piping!
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Steam Pressure (P.S.I.): Surface Area of Equipment: Annual Operation Hours: COST MM/BTU: Heat Loss (million btu’s): Heat Saved (million btu’s): Total First Year Savings: Total Insulation Cost: Total Labor Cost: Payback Days: |
150 10 sq. ft. 8760 $ 13.70 102.23 95.31 $ 1,305.73 $ 300.00 $ 22.50 90 |
80 10 sq. ft. 8760 $ 13.70 87.45 92.78 $ 997.06 $ 300.00 $ 22.50 110 |
40 10 sq. ft. 8760 $ 13.70 50.97 47.01 $ 644.10 $ 300.00 $ 22.50 183 |
Assumed 80 degree ambient, year round operation. $13.70/1000# steam cost.
Heat Losses Through Uninsulated Indoor Valves based on ASHRAE Heat Transfer Figures
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