Calefactory

a.	1.	Making hot; producing or communicating heat.
n.	1.	(Eccl.) An apartment in a monastery, warmed and used as a sitting room.
	2.	A hollow sphere of metal, filled with hot water, or a chafing dish, placed on the altar in cold weather for the priest to warm his hands with.

Adj.

1.

calefactory - serving to heat; "a heating pad is calefactory" Synonyms: calefactive, heating

calefactive, heating, hot