Yes, braiinsOS interface makes that easy enough, can set target temperature, power, or hash rate. So 400w yields about 4th/s... and 800w yields anything up to 10th/s... if I go to 1200w then I can get 13.5th/s and a toasty office.

But my goal is to have something running functionally in the background for 'free'... given I need a bit of warmth and dehumidifier anyway. Grid power costs a bomb here in UK, so it's more of a hobby if you know what I mean.