Can a bitcoin miner heat a hot tub?

Short answer

Yes. The HashTub's sealed, roughly 4 kW miner heats a hot tub through a cupronickel heat exchanger, up to 104°F. It comes built into a Snorkel cedar tub, or as a retrofit kit that replaces the heater in a tub you already own.

How it works with the tub's heater

In a Snorkel HashTub, a temperature controller runs the miner and the tub's 5.5 kW heater together until the water reaches 90°F. Then the heater shuts off and the miner carries the tub to your setpoint, up to 104°F. In a retrofit, the HashTub takes the old heater's place, and the tub's control board switches it on whenever it calls for heat.

OptionPrice (heat system)Power
HashTub by Snorkel (Pleb, 24 J/TH)$3,895One 60A GFCI spa circuit for the whole tub
HashTub by Snorkel (Pro, 17.5 J/TH)$4,395One 60A GFCI spa circuit for the whole tub
Retrofit kit (Pleb or Pro)$3,895 or $4,39525A, 240V on the tub's heater circuit