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Homes given Honeywell's Lyric used 4-5% more.","account":"Energy Trust of Oregon and the gas utility NW Natural offered smart thermostats for $19 to qualifying customers with gas furnaces for the 2014-15 heating season. Qualifying candidates were randomly assigned to buy either a Nest Learning Thermostat or a Honeywell Lyric and install it themselves. About 1,000 randomly chosen customers who were not contacted formed a comparison group. Energy Trust evaluation staff ran the billing analysis, and Apex Analytics and reviewers from DNV-GL and Seventhwave checked it. Apex reported on 1 March 2016 that Nest homes saved about 34 therms a year, about 6% of heating load. Lyric homes used 4-5% more gas for heating. The Nest estimate covered 153 homes, and its 90% confidence interval ran from 13 to 55 therms. An intention-to-treat estimate was not statistically significant. Nest users more often left the occupancy feature on, and their daily adjustments fell more over the season. 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