I wonder if you've heard of Tim Meyers of Bethel Alaska? He had greenhouses working in Alaska, and if I remember correctly from what I read back in 2009, used compost heat kind of like this, (not Tim Meyers)
NPR on Tim Meyers
https://www.npr.org/sections/thesalt/2015/02/26/389011370/alaska-farmer-turns-icy-patch-of-tundra-into-a-breadbasket
Update on local public radio in 2019,
https://www.alaskapermies.org/2019/10/08/bethels-meyers-farm-shuts-down-market-focuses-on-internet-sales/
Direct link to Meyers Farm,
http://meyersfarm.net/
