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I don't know if it applies everywhere, but two factor come to mind: the (somewhat recent) change in energy and gas price did make heat pump a lot more competitive with more traditional heating solutions, and recently there are a lot of economic incentives (at least, here in Europe) to renovate house for energy efficiency, which make solar panel and heat pump very attractive.

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> and recently there are a lot of economic incentives (at least, here in Europe) to renovate house for energy efficiency, which make solar panel and heat pump very attractive.

Economic but also legal and geopolitical: fuel oil furnaces are getting restricted or banned, and the combination of climate change, air quality standards, and russian instability makes gas look at lot worse than it did 10 or 20 years back.

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