house-heating
/ˈhaʊsˌhiːtɪŋ/noun
1 Scottish. A party or social event to celebrate moving to a new home, featuring the lighting of the fire; a house-warming. Now rare.
2 Literal. The action or process of heating a house. Frequently (and in earliest use) attributive.
Origin
Late 18th century. From house + heating. Compare earlier house-warming.