Last week, I explored the macro impacts of electrifying our heating systems and using ground source (aka geothermal) heat pump (GHP) systems rather than cold-climate air-source heat pumps (CCHPs). In a nutshell, deploying GHPs in the colder regions of the country would reduce necessary electric demand growth by 77 percentage points compared to CCHPs. Ground source heat pumps would also avoid the construction of 43,500 miles of transmission lines, enough to crisscross the United States 16 times. At $2 million per mile, that's $87 billion. That's a rounding error in Washington, but it's a lot of money for the rest…
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