In 1947, Raytheon built the "Radarange", the first commercially available microwave oven.
It was almost 1.8 metres (5 ft 11 in) tall, weighed 340 kilograms
(750 lb) and cost about US$5,000 ($52,809 in today's dollars) each. It
consumed 3 kilowatts,
about three times as much as today's microwave ovens, and was
water-cooled. In 1961, an early Radarange was installed (and remains) in the
galley of the nuclear-powered passenger/cargo ship NS Savannah.