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An aquarium heater is a device used in the fishkeeping hobby to warm the temperature of water in aquariums. [1] Most tropical freshwater and marine aquariums are maintained at temperatures that range from 22 to 30 °C (72 to 86 °F). [1] [2] [3] The types include glass immersion heaters and undergravel heating. There are also heating mats that ...
Small domestic immersion heater, 500 W. An immersion heater has an electrical resistance heating element encased in a tube, placed in the water (or other fluid) to be heated. The heating element might be inserted directly into the liquid, or installed inside a metal pipe to protect against corrosion and facilitate maintenance.
Such water heaters are often fitted with an auxiliary electrical immersion heater for use if the boiler is out of action for a time. Heat from the space-heating boiler is transferred to the water heater vessel/container by means of a heat exchanger, and the boiler operates at a higher temperature than the potable hot water supply.
A thermal immersion circulator comprises a circulator pump or motorized impeller to move the fluid, a heating element immersed in the fluid, an accurate temperature probe, and control circuitry which compares the measured temperature with the desired value and supplies power to the heater as required to stabilize the temperature.
Around 208,000 immersion heaters, 9500 small water heaters, 4050 bathroom water heaters and 620 water boilers were manufactured in 1938. Only five percent of these were exported. The company was already prohibited from using copper in hot water cylinders from 1937. In 1939, 350 employees generated an annual turnover of 3.2 million Reichsmark.
Beyond that, some cold-lovers say that exposure to icy temps boosts their mental health (and one 2023 study in Biology would agree; it found that participants subjected to cold-water immersion ...
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