Furred element from immersion heater
Furred element from immersion heater. An immersion heater consists of a water tank fed by cold water which enters at the bottom. A heating element heats the water which rises by convection and exits via a hot water pipe at the top. The coating is due to deposition of carbonates of calcium and magnesium salts present in water., by IAN GOWLAND/SCIENCE PHOTO LIBRARY
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