Ask This Old House 
Smart Thermostat Install/Barn Solar Install
Season 13, Episode 26 of 26Roger teaches Kevin about lengths to consider when mowing the lawn. Richard travels to Pittsburgh to install a thermostat that interfaces with a smartphone to save energy and money. Ross Trethewey walks Kevin through the installation of a photovoltaic solar array on the barn. And Kevin, Tom, Richard and Roger ask, "What is it?"
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