Yes it is definitely easier to buy a real heater. The calculation is also wrong, because GPU produce heat only as a (conceptually unwanted) by-product, while the heater produces heat as its main product. So GPU heat production per Watt is not comparable at all to a heater.

Using mining hardware for heating makes only sense if their mining rate is nearly profitable. So the heat is some "added value" of the mining operation and not vice versa.


ya.ya.yo!