BOD (Biochemical Oxygen Demand)
The quantity of oxygen consumed by aerobic microorganisms during the decomposition of organic matter in a water sample is defined as the Biochemical Oxygen Demand (BOD).
Consumers who live in areas with no district heating have to use their own boiler to produce central heating. A boiler installation has the following components: burner, nozzles, boiler casing, hot-water tank (integrated or separate) and a chimney.
The primary task of the boiler shunt is to ensure that the difference in temperature between the top and the bottom of the boiler is not too high. A high temperature difference can cause tensions in the material and thus reduce the life of the boiler.