Furnaces

right|thumb|Athanor In alchemy, an athanor is a furnace used to provide a uniform and constant heat for alchemical digestion.

Rinnai Corporation is a Japanese multinational company based in Nagoya, Japan, that manufactures gas appliances, including energy-efficient tankless water heaters, home heating appliances, kitchen appliances, gas clothes dryers and commercial-use equipment such as rice cookers, grillers, fryers and salamanders.

oven used to melt raw materials into glass