Except that electricity use in buildings produces three times more GHGs than the direct use of natural gas (even after accounting for methane). Electricity is 2.5x's more GHGs if we include fuel oil and propane also.https://twitter.com/bradplumer/status/1007281096487251970 …
-
Yes, fair enough. I meant air-source heat pumps. Ground source HPs are simply not a feasible technology for many households, so often the default is to discuss "heat pumps" with the implication they are air-sourced.
New York City recently published online tool that shows that, except in Manhattan, GHP is "feasible" for at least 74% of buildings -- with a pay-back of 12 years or less. Tool: http://www1.nyc.gov/assets/ddc/geothermal/index.html … Report: http://www1.nyc.gov/assets/ddc/geothermal/Geothermal%20Screening%20Webtool%20Pre-Feasibility.pdf …