Instant, on-demand water heaters are nothing new for your home. Now a company called Heatworks is trying to take that same technology and miniaturize it for consumer products. It has two such gadgets on display here at CES 2019 — and the more interesting to me is the Duo carafe. If you want hot water for coffee or tea, it promises to heat it instantly as you pour it out of the carafe instead of slowly heating the entire pitcher of water.
It heats the water instantly with a technology Heatworks calls an “Ohmic array.” That’s “ohmic” as in “ohm” as in electrical resistance. It uses the water itself as an electrical conductor between graphite electrodes, vibrating the minerals in it, as CEO Jerry Calahan explained to me here at the event....