This is an untapped market - the only options right now seem to be:

* Full power miners, needing 220v / 3000w, so unsuitable for normal homes
* Old miners capable of running on 110v residential power supplies (S9, S17, modified S19/S21 that are expensive)
* Tiny toy lottery miners that have little hash power and no heating capability

A mini heater consuming 800w and providing 40 Th/s would be awesome, and great for home use esp. for those of us in colder climates.