Mining cryptocurrency takes a lot of processing power — the kind offered by powerful graphics cards. Those generate a lot of heat. Instead of fighting it with liquid cooling systems, the Qarnot QC-1 Crypto Heater uses it to heat your home. Housed in its handsome wood and aluminum wall-mounted case is a pair of Sapphire Nitro+ Radeon RX 580 cards with enough power to mine at up to 60MH/s. Designed as a plug-and-play solution, it can be set up in as little as ten minutes and has an added heat-boosting mode that can be turned on via an app or on the unit itself.