Not me and I have a place that uses a space heater 9 to 10 months each year. As I said I use three PCs each one has two 1080tis that have been paid off they use about 800-900 watts and are pretty quiet as I run them with low clocks.

This is the problem with this gear if marketed as a heater that mines it is 1800 which is too costly.

They are better off with s9 chips clocked to 80 watts .

The s9 clocked to freq 475 at 8 volts would do 540 watts and 7th

design a two board case like the older s7 ln and it would be under 500:bucks vs 1800