Be very careful about these calls, prior to moving to TV, and just for giggles, I went along with the caller. They had a "survey" of the house followed up with a meeting that showed several 'energy saving' options, since I was a register professional electrical engineer I saw through many of their claims, kept my wallet closed and left.
As noted above your electrical supplier will typically have a program to inspect your house and provide suggestions to lower your electrical bill, then it is completely up to you.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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