Determine the breakeven cost for SIS-roof retrofit applied to a house located in Seattle, WA. The house
Question:
Determine the breakeven cost for SIS-roof retrofit applied to a house located in Seattle, WA. The house has BLC of 550 Btu/°F·hr and a roof area of 1,500 ft2. The SIS-roof is operated using two-step controls with a low R-value of RSI-0.7 and a high R-value of RSI-5.9. The house is heated by a natural gas-fired furnace with an efficiency of 80 percent and cooled with AC with seasonal energy efficiency ratio (SEER) of 15.0. The electricity rate is $0.11/kWh and natural gas price is $2/therm. The cost analysis can be performed for a life cycle of 40 years and a discount rate of 5 percent.
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So the breakeven cost for the SISroof retrofit is approximately 19091 per year 1 Cal...View the full answer
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Related Book For 
Energy Audit Of Building Systems An Engineering Approach
ISBN: 9780367820466
3rd Edition
Authors: Moncef Krarti
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