The optimal design of wall heating

Wall heating, similar to underfloor heating, consists of a relatively long pipe system with a small pipe cross-section in relation to the usual hot water heating. The design should take into account the following components:

heat generator with gas separator

  • correctly dimensioned pump
  • manifold with venting possibility
  • individually switchable heating coils connected in series
  • pipe loops completely unproblematic

The view of a not yet plastered but already fired wall heating system shows that the individual heating circuits (Register) with vertical or horizontal loops. Here do-it-yourselfers repeatedly fear that air could accumulate in vertical slings in particular. For a properly designed wall heating is not so.

Initial venting of the wall heater after commissioning via distributor

First of all, the line system is vented via the distributor. The flow rate of the water is greater than the rate of rise of the air. Therefore, air bubbles are literally entrained with the water and can then be vented conveniently at the manifold.

Then it is then heard from specialist companies again and again that the wall heating is no longer to vent. That is not completly correct. Rather, a heat generator should be integrated, which is equipped with a gas separator.

Then the gas separator should bleed the system well.

By heating the water, more oxygen dissolves over time. This air can then be "vented" via the gas separator. If the excretion of air gases is particularly high, this is reflected in a now no longer correct water level. Then you just have to refill water.

Tips & TricksChildren are constantly coming to hear about do-it-yourselfers as a "good solution" for integrating a breather valve at the highest point of the wall heating, at the top of the wall. In an optimally matched wall heating with the components already described that is not necessary. On the contrary, there would be another danger point here. Tips & Tricks It is very likely that this bleeder valve will leak over time. Then from here the entire wall is soaked from top to bottom. In the event of damage, the plaster must also be removed here in order to repair this valve. Manifolds and heaters with gas separator and a properly sized pump do not even lead to a real air problem in the wall heating.

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