Determine the cost-effectiveness of SPP for installing three smart thermostats in a house in Phoenix, AZ, at

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Determine the cost-effectiveness of SPP for installing three smart thermostats in a house in Phoenix, AZ, at a total cost of $700. The house has an overall BLC of 500 Btu/°F·hr and is cooled with an AC with SEER of 15.0. Assume the electricity price is $0.12/kWh, and that the smart thermostats reduce air-conditioning loads by 10 percent.

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