Many fireplaces and stoves are available with an optional water heat exchanger. Fireplaces and stoves of this kind not only produce cozy radiant heat, but also warm up the water in a water tank which can be used to heat the whole house. These tanks are often connected to a solar panel and a conventional heating system (such as a gas condensing boiler or heat pump) which supply the basic heating requirements. The result is a modern mix of energy types. In spring and autumn, stoves of this kind often provide sufficient heating on their own.
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