Heat doesn't grow plants, homie, light does.
Providing heat is rarely the issue with indoor cultivation; exhausting it nearly always is.
^ this
You could switch your mining rigs off, use the same electricity to power some decent HPS lights and grow yourself some scrog-grown powerplant, sell the product, and you will earn far more than you could by mining bitcoins

[*check your local laws before attempting. lol]
+100
Growing marijuana is thousands of times more profitable than mining Bitcoins but is unfortunately illegal (and for that reason more profitable). If it could be done legally I think I would have myself a new career, even with the significantly reduced profit margin.
This being said some people have been raided by the police because they thought their electricity consumption was due to a "grow op" rather than their mining rigs.
Kind of a sad state of affairs the world is where you can get searched and raided just for using more electricity (even when you are paying for it).