Hundreds of heating complaints reveal how controversial $50 million energy savings project has left Mt. Diablo schools in the cold

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Hundreds of heating complaints reveal how controversial $50 million energy savings project has left Mt. Diablo schools in the cold

CONCORD — Krista Miller can open an app to double check if her husband turned down their “smart” thermostat before leaving home, but the 23-year teacher hasn’t been able to decode the daily temperature inside her Pine Hollow Middle School classroom since last fall. That’s when the digits on the HVAC system’s display started mirroring her algebra curriculum: an unpredictable variable that could have infinite solutions — or potentially no answer a…