Appliance: A labour-saving device connected to a source of energy such as gas or electricity.
Based on this, these stoves found in a a few historic kitchens in Europe probably count as appliances.
Monet’s house in Giverny, France. This huge kitchen stove was set off with checkered blue tiles with lots of brass accents.
Near Utrecht, Kasteel de Haar had a stove that was as big as most people’s kitchens.
Sonneveld House in Rotterdam was built in 1933, a prime example of Dutch modernism in architecture. The kitchen stove is this sweet little thing where the cook prepared all the Sonneveld family’s meals. Some synonyms for appliance: gadget, contraption, contrivance, gimmick, gizmo.
So now I’m off to see if I can find some more gizmos hanging around the house…