reactor; reacting furnace
atomic reactor; nuclear reactor
hearthfire; ingle; open fire in a fireplace
converter (used in refining); rotary kiln
fireplace or hearth dug into the ground or floor
fireplace or hearth dug into the ground or floor
sunken hearth; sunken fireplace
high-temperature gas-cooled reactor
pressurized water reactor; pressurised water reactor; PWR
Fornax (constellation); the Furnace
incinerator; refuse furnace
furnace (for casting bronze)
sunken hearth; sunken fireplace
sunken hearth; sunken fireplace
sunken hearth; sunken fireplace