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Energy Comparison Chart

Life Cycle Cost Estimate for 1 ENERGY STAR Qualified Computer

Annual and Life Cycle Costs and Savings for 1 Computer(s)
Annual Operating Costs*Annual electricity consumption (kWh) 1 ENERGY STAR Qualified Units 1 Conventional Units Savings with ENERGY STAR
Electricity costs $8 $53 $44
Annual electricity consumption (kWh) 85 kWh 542 kWh 457 kWh
Maintenance costs $0 $0 $0
Total $8 $53 $44
Life Cycle Costs*
Life cycle operating cost (electricity and maintenance) $30 $191 $161
Electricity costs (lifetime) $30 $191 $161
Maintenance costs (lifetime) $0 $0 $0
Purchase price for 1 unit(s) $900 $900 $0
Total $930 $1,091 $161
Simple payback of initial additional cost (years) 0.0
*This chart assumes that 100% of users turn off their computer(s) at night. Annual costs exclude the initial purchase price. All costs, except initial cost, are discounted over the products' lifetime using a real discount rate of 4%. See "Assumptions" to change factors including the discount rate night time turn off rate.
A simple payback period of zero years means that the payback is immediate.


Summary of Benefits for 1 Computer(s)
Initial cost difference $0
Life cycle savings $161
Net life cycle savings (life cycle savings - additional cost) $161
Simple payback of additional cost (years) $0.0
Life cycle energy saved (kWh) 1,829
Life cycle air pollution reduction (lbs of CO2) 2,808
Air pollution reduction equivalence (number of cars removed from the road for a year) 0.24
Air pollution reduction equivalence (acres of forest) 0.35
Savings as a percent of retail price 18%