Amish heat their homes using heaters and stoves
Amish heat their homes in a variety of ways. Amish use both heaters which run on propane and natural gas, as well as heating stoves which burn wood and coal. Stoves are more common among more conservative Amish. Stoves are typically located in the basement or first floor.
Vents in flooring and ducts may help circulate heat through the house in some Amish homes. Amish who use firewood will cut their own or purchase it.
In more conservative communities, a cooking stove may also serve as a source of heat. Additionally, the gas lighting used by many Amish generates a considerable amount of heat as well.
For further information, see:
Living Without Electricity, Stephen Scott and Kenneth Pellman