How should I know? It depends on what you are trying to optimize for. The author seems to think if you want to minimize on-site construction costs, a radioiso

How should I know? It depends on what you are trying to optimize for. The author seems to think if you want to minimize on-site construction costs, a radioisotope thermal generator is the way to go. That's pretty far out there. My comment was simply explaining why the author brought up resistive electric heat at all. Though why not just use the waste heat from the RTG, but then we are back to needing ducting I guess. Ultimately it depends on what tradeoffs you want to make and your local climate. I think district-based aka neighborhood scale geothermal is promising from a sustainability perspective, but introduces a significant coordination problem.