Unfortunately, my heat is from a gas furnace but gets pushed throughout the house with a HVAC unit. So, when it gets cold I will open the door to my mining room some hours each day to let the heat flow into other rooms. It won't save me much on electricity, but I'll probably end up using less gas and may not have to run the HVAC fan as much.

I wish there were an easy way to redirect the heat from the miners into my HVAC system, but there isn't and I can't make any structural modifications to the house as I don't own it.
But I may try to corral the heat from my 4 miners and duct it to one of the HVAC air intakes in the mining room and see how that does.