One of the most powerful weapons you can wield to fight climate change is … an appliance. A heat pump is a fully electric device that transfers warmth from outdoor air into a building, then reverses in the summer to act like an air conditioning unit. It’s much more efficient than burning planet-warming gas in a furnace, and will save the average American household more than $550 a year on their utility bill, according to one estimate.
Emphasis on average. Every American home is different in size and energy efficiency, and the US hosts wildly different climates that determine how a heat pump operates. But
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