The annual value of the pump is $692.
The annual value of the equipment can be determined by calculating the annuity value of the savings and deducting the annuity value of the maintenance cost and then dividing the number by the annuity factor.
Cost of high-efficiency pump and motor = $10,000
Estimated lifetime = 15 years
Savings per year = $1,000
Total savings over equipment's lifetime = $11,120 ($1,000 x 11.12)
Annual maintenance cost = $300
Total annual maintenance cost for 15 years = $3,426 ($300 x 11.12)
Annuity Factor at 4% for 15 years = 11.12
Annual value = $692 ($11,120 - $3,426)/11.12
Thus, the annual value of the pump is $692.
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