Filling your heating system with water treated in the right way is crucial for its efficiency, comfort and safety!
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Water plays a crucial role in heating systems: It transports the heat produced in the boiler to around your home or offices. This water comes into contact with almost all the components of your heating system - including; pipework, radiators, expansion tanks, pumps and valves. For this reason, appropriately treating the water in heating circuit is a decisive step in ensuring smooth operation.
Worry-free with the right water
Heating systems have become more and more sophisticated in recent years, but this has also made them more susceptible to faults. Even minor irregularities can lead to complications. Water and its constituent parts play an important role in this respect. Decisive are factors such as water hardness - i.e. mineral content - pH value and the concentration of oxygen and salt.
Well-known heating manufacturers already require compliance with certain standard values in their warranty conditions, e.g. in the UK this includes filling the central heating loop with hard or naturally occurring soft water and adding an appropriate scale inhibitor. Consequently if untreated water is used for the heating, the guarantee may be void in the event of damage. Properly prepared heating water means you are always on the safe side. Get advice from an expert BWT Best Water Professional in your area!
Limescale as a heat blocker
Limescale tends to accumulate more and more at high temperatures. Many of us are all familiar with this phenomenon from the inside of our kettles, for example: When the water is heated, the limescale settles at the bottom of the kettle as a white deposit. The thicker this layer of lime, the longer the water takes to boil. This is exactly what happens in the heating system too. Layers of limescale have an insulating effect and make it harder to transfer heat, i.e. more energy has to be used in order for the heat output to remain constant. A limescale coating of only one millimetre increases energy consumption by up to 10 percent. Heating costs can soon start to soar.
Limescale particles dissolved in the water can also be distributed throughout the heating system and, among other things, cause valves to clog.
Corrosion is triggered by a variety of factors and usually goes unnoticed. A mix of iron, steel, aluminium or copper, often found in modern heating systems, leads to electrochemical reactions and thus to corrosion. The most familiar form of corrosion is rust in iron. In addition, the pH value of the water and the oxygen and salt content also play an important role. Acidic water with a pH value below 7 corrodes metallic parts. If the salinity - i.e. the electrical conductivity - and the concentration of oxygen are too high, corrosion processes are accelerated.
Metal particles detached by corrosion can get into the entire heating circuit and affect the whole system as so-called corrosion sludge. In the worst case scenarios this can reduce efficiency and lead to higher maintenance costs.
Although central heating is a self-contained system, it is never completely airtight. For example, air can get into the system when replenishing water or due to leaky fittings and connections. A particularly "leaky" point: the air-permeable plastic pipes used in underfloor heating.
Too much air in the system makes it difficult to transmit heat and the radiators no longer get really warm. In addition, noise caused by air - such as knocking or gurgling - can be quite annoying.