fur ‧ nace /ˈfɜːnəs, ˈfɜːnɪs $ ˈfɜːr-/ BrE AmE noun [countable]
[ Date: 1200-1300 ; Language: Old French ; Origin: fornaise , from Latin fornax ]
1 . a large container for a very hot fire, used to produce power, heat, or liquid metal
2 . a piece of equipment used to heat a building