I'm looking to get an ASIC miner that's as affordable and will burn through somewhere near the same amount as a regular space heater with the colder days ahead. I already know that the device won't be profitable, but my main use for it is as a heater and the BTC earnings on the side just serve as bonus (especially since I'll only turn it on when it's cold), hence my wanting it to cost/consume as close to a regular space heater as possible. I've heard of some folks switching out fans and installing underclocking firmware to repurpose miners to achieve this and, while I have no experience with such, I have built a couple gaming PC's and always love to learn new skills. I'd like a unit I can plug into a regular wall outlet (US), and recommendations or resources you guys suggest?