The heating system is nowadays an essential housewares inside a house types. In the past castle were warmed by the flames and sometimes there was a stove in the kitchenware that was used also for cooker. Today each room has got its own heater. Usually the fire gas heats up the water; the water, flowing into the heaters, warms the rooms. In the last years renewable sources of energy have been exploited in order to reduce the pollution; heat pipe warm the water of the heaters using the sun. Modern stoves work using pellet, small lumber spheres that are burnt producing heat.
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