A lot of folks are in situations where they either don’t pay for electricity or pay a flat rate. Why aren’t they all mining Bitcoin? How about office workers? Nobody complains if they plug in a space heater, a Lava lamp, an aquarium, or a personal phone charger. Maybe the landlord is paying the electric bill in any case. Why wouldn’t there be a Bitcoin miner that “flies under the radar” by consuming less than 500 watts? Supposedly it takes about 13,000 kW/h to mine one coin (source), so that’s about three years at 500 watts per hour. Three years is a long time to wait (we could get lucky and earn a Bitcoin after 1 day, right?), but on the other hand a $10,000 bonus once every three years would be welcome!
How about folks who live in apartment buildings where the landlord hasn’t installed individual electric meters? If there are indeed any of these buildings left, why don’t the tenants replace all of the bulbs with LEDs, refrain from using the electric stove, and then run two 1500-watt Bitcoin miners 24/7?
Here’s a miner designed for home use: the AntMinerR4. It consumes 845 watts of power and generates “52 dB” of noise (actually 52 dBA?).