The cost of his crypto miner is about $1500, and it generates about 750watts of heat.
No offense , but 750 watts is not alot of heat to be spreading around in below 30 degrees Fahrenheit temps.
Claiming it is enough to supplement heat a outdoor chicken coop to near 70 degrees, keep a greenhouse with strawberries warm ,
and warm a house is a stretch of the imagination.
In contrast , I had a friend keep a small greenhouse above 32 degrees with a normal 1500 watt heater ($40) so he could grow tomatoes in winter.
If he mined 1 ethereum coin in a year that is about $1500 , it would cover the cost of the miner, and the 2nd year it could cover almost the electricity cost for the majority of the year.
I am having a problem believing this article, as it fits into the too good to be true.
If he is doing so great mining, why only winter, just place it out side with a roof and let the heat dissipate into the air and mine 2 ethereum instead of one during the year.
Sorry some thing about this article don't sit well with me, if a $1500 miner can earn $1500 every winter, why is not everyone already doing it all year long. His article also totally ignores the changes in difficultly almost monthly that make mining less profitable.
If he is telling the truth, then we should be mining all year , not just in winter, and find a way to send that waste heat to a water heater, as that is a year long excuse. But to be honest, their are so many holes in his story, I can't bring myself to believe him.
A realist account of how hard it is to be a PoW miner :
https://bitcointalk.org/index.php?topic=5316414.msg56501490#msg56501490