炉

fast reactor

heavy-water reactor

open-hearth furnace

breeder reactor

converter (used in refining); rotary kiln

portable incense burner (ball-shaped and carried in one's clothes)

melting furnace

fireplace or hearth dug into the ground or floor

hot-blast stove

light-water reactor

furnace cooling

solar furnace

fuel source for a (pocket) body warmer

drier; toaster

prototype reactor

opening the winter hearth

furnace wall

wind furnace

heating furnace

closing of the winter hearth

Astronomy

Fornax (constellation); the Furnace

first lighting of the hearth in a Zen temple (first day of the 10th or 11th month)

electric furnace; electric oven

cupola furnace; cupola