مدفأ (دير)

Also known as Pisalis, Warming house, Calefactorium, Hothouse

thumb|500px|Plan of Grey Abbey, Down|Grey Abbey in [[County Down, Northern Ireland. Note the calefactory in the southeast corner (upper right on the map).]] The calefactory (, also warming house) was an important room or building in a medieval monastery in Western Europe. In the present day it is a communal place of recreation and fellowship in religious houses such as monasteries, priories, and convents.