We have two space heaters in my office in Canada. Using an electric heater when we could be using a mining rig is wasting electricity. I am going to show my boss this article about these guys who heat their office with a mining rig and made a decent amount of Ethereum.
https://thenextweb.com/hardfork/2017/12/25/cryptocurrency-miner-ethereum-heater/
This guy on Youtube has a bunch of mining equipment in his basement and it heats his whole house!
Also
Too many places treat computer generated heat as something to pump out of the space as a nuisance. Heat your space and generate crypto. IBM filters their computer generated heat to heat up a swimming pool.
This cat knows the deal!
Source www.buybitcoinworldwide.com/wp-content/uploads/2017/02/Fomymplr-1024x768.jpg