Running three S9’s, underclocked with fan upgrades, as space heaters.   We have a natural gas furnace and I calculated at my current rates for gas and electricity it is 3 times for expensive to heat with electricity.  There is the benefit of some non-KYC sats, and setting back the temperature on the thermostat for the natural gas furnace.  Helping secure and decentralize the network with a minuscule amount of hash power not included in the top three mining pools. The best part is the ability to talk about bitcoin when people come to our B&B as ask; “What is that?” 

 I helped a few of Bitcoiners in our meetup group get their own S9’s with the fan upgrades and Braiins OS.   They are living in apartments with electric heat, baseboard heaters.  So it is a no brainer for them to run S9’s for heat and turn off the baseboard heaters.  Same cost factor and they earn some non-KYC sats.  Win win!