By Amy Westervelt

As spring blooms, researchers are looking back at the past winter to see how much people paid, and could have saved, on their heating bills.

Analyzing data from thousands of its programmable smart thermostats, a company called EnergyHub estimates that, by turning down the heat, people can save nearly twice as much as the U.S. government had estimated.

With summer looming, EnergyHub is starting to calculate how much you could save on air conditioning and predicting similar results.

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