My statement about selling heat was clumsy and wrong. I should have said it is uncommon, awkward . . .
Not really. Energy mavens such as me know about district heating but most people have never heard of it. It seems unlikely. It only works in built-up concentrated areas where there happens to be source of heat. Especially isolated areas in cold places with bad weather where everything is under the control of a central planner. Such as the campus of Cornell University. *
* If you don't like the weather in Ithaca, NY, wait 15 minutes.