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Nova Scotia Power on Twitter: "What can a heat pump save you? Find out with our new Heat Pump Savings Calculator: https://t.co/MpljY5dtpu https://t.co/YinX0RAgEH" / Twitter
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File:Front of Radio Shack EC-4027 calculator, power off, in vinyl case, against white background (26678157303).jpg - Wikimedia Commons
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