this post was submitted on 25 May 2025
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Insulation is insulation, it can keep something hot as much as it can keep something cold. And a refrigeration system reversed becomes a heat pump. Would cost next to nothing to make something like this happen from a mechanical standpoint.
While that's true regarding insulation, the degradation of materials might be different at different temperatures. It might not be an issue as I have no idea what the materials in an ice cream truck are, but if you want to maintain a hot beverage-temperature, several types of paint, treatments, walls and floors might fail over time.