· A retrofitted space-heating system is being considered for a small office building. The system can be purchased and installed for $120,000, and it will save an estimated 300,000 kilowatt-hours (kWh) of electric power each year over a six-year period. Akilowatt-hour of electricity costs $0.10, and the company uses a MARR of 15% per year in its economic evaluations of refurbished systems. The market value of the system will be $8,000 at the end of six years, and additional annual operating and maintenance expenses are negligible. Use the benefit-cost method to make a recommendation.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Payback Period Method and Benefit-Cost Ratio Method
1. A retrofitted space-heating system is being considered for a small office building. The system can be
purchased and installed for $120,000, and it will save an estimated 300,000 kilowatt-hours (kWh) of
electric power each year over a six-year period. Akilowatt-hour of electricity costs $0.10, and the company
uses a MARR of 15% per year in its economic evaluations of refurbished systems. The market value of
the system will be $8,000 at the end of six years, and additional annual operating and maintenance
expenses are negligible. Use the benefit-cost method to make a recommendation.
Transcribed Image Text:1. A retrofitted space-heating system is being considered for a small office building. The system can be purchased and installed for $120,000, and it will save an estimated 300,000 kilowatt-hours (kWh) of electric power each year over a six-year period. Akilowatt-hour of electricity costs $0.10, and the company uses a MARR of 15% per year in its economic evaluations of refurbished systems. The market value of the system will be $8,000 at the end of six years, and additional annual operating and maintenance expenses are negligible. Use the benefit-cost method to make a recommendation.
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