Cold is to Refrigerator as warm is to? [closed]

We have the Refrigerator, which sort of "create their own cold" using electricity (these obviously have to be plugged in).

What do you call an electrical device that keeps things warm?

I would think a "Warmer", but the antonym of "warmer" is "cooler", and a "Cooler" is already a thing (it's an insulating device that keeps a cold thing cold, but it doesn't "generate" cold from being plugged in).

Please ignore the scientific atrocities of saying "generate" cold. I'm simply being brief.

A warming cabinet is a heated cabinet used to keep food warm between being cooked and served.

You use the word refrigerator in the title of your question. You also use the same word in the body of your question.

If you really want something analogous ("Cold is to Refrigerator as warm is to?"), the answer would be oven:

: a chamber used for baking, heating, or drying
// Preheat the oven to 350 degrees.
// Please take the pizza out of the oven.

Like a refrigerator, an oven is also a kitchen appliance—but it serves exactly the opposite function.