Well this is really cool.

Ive seen the large data centers handling heating for nearby residential units or in the same building, but not with a localized unit like this like you said.

I'm (hopefully) going to be getting some decent property for a farm, most likely will have to build, and this makes me wonder if a small setup like mine (a dozen or so machines) feeding before the heating system as a preheating (like solar water heating) would be worthwhile.

Going to have to have a chat with an ME I know!