Heating with the wall

Wall heating is one of the most efficient types of heat transfer. As surface heating, they are extremely well suited for combination with heat pumps, for example. In contrast to comparable systems, SANHA's wall heating modules offer the advantage that they can provide heat both in the low temperature range and up to 60 °C. In addition, they are much easier to install. An old building in the south of Essen is currently being fitted with wall heating modules. This is a good example of how our systems utilise their advantages and support energy-efficient refurbishment at the highest level in a technology-neutral way.  

Wall heating module shows its specific advantages

The building, built in 1977, is currently undergoing extensive energy refurbishment. This includes efficient facade insulation as well as a modern heating system based on a natural gas condensing boiler. A total of two floors with five rooms (one downstairs, four upstairs) are to be heated. The calculated heating load of the upper floor (85 m²) is around 2.5 kW (assuming 30 K to the outside temperature), which is optimally provided by wall heating modules, while the ground floor is supplied with heat by underfloor heating. 

The client opted for SANHA® wall heating modules primarily because of their high flexibility. The maximum heat output is up to 210 W/m², which is higher than comparable products. This means that wall heating modules can be operated very efficiently in the low temperature range during the transitional period and still utilise the high possible flow temperatures of the natural gas heating system on particularly cold days.

Another reason why the client opted for SANHA® wall heating modules was the ease of installation: using a mounting rail and plugs, they are much easier to install than underfloor heating, for example; there is no need for labour-intensive ripping up of the floor and subsequent re-installation, drying times for the screed, etc. - a clear advantage.

Added to this was the fact that neither the wall heating modules nor the underfloor heating generate any convection or dust: "As an allergy sufferer, this aspect was very important to me," says the client. On the upper floor, which is particularly exposed to the sun on hot days, the wall heating modules can also be used for cooling if required. This applies in particular to a studio with high ceilings.

Preventing mould and keeping temperatures below the dew point 

Wall heating also makes sense when it comes to preventing mould on the walls. Mould develops when water vapour from the air condenses on colder objects, i.e. when the temperature falls below the dew point (or dew point temperature). The type of ventilation also plays a role: it is better to ventilate the room several times a day than to keep the window permanently tilted. Conventional convection heating systems cannot prevent moisture loss or condensation in every situation, as the warm air collects on the ceiling and sinks downwards after cooling - and can provide an ideal breeding ground for mould in the cooler areas of the wall.  

Wall heating works on the principle of the sun 

Wall heating, on the other hand, does not primarily heat the air, but warms objects and people through heat radiation - similar to the sun. This is not only perceived as very pleasant, but also ensures lower humidity. In addition, this type of panel heating does not cause draughts or swirling dust. Conventional radiators, on the other hand, lead to the air movement described above, which is caused by layers of different temperatures. For ideal protection against mould growth, operation at a minimum temperature of 16 °C is advisable (climatic conditions in Central Europe; the dew point can shift under very cold or very dry climatic conditions).  

Room heating and cooling 

With the wall heating module, SANHA® provides a system for room heating and cooling (room heating) that is characterised in particular by exceptional living comfort, very simple installation, significantly better energy efficiency due to a lower average room temperature and particularly health-friendly properties. This system is ideal for both new buildings and the refurbishment of existing buildings. 

Wall heating modules are supplied ready to use with a surface that can be painted or wallpapered directly. The SANHA® wall heating module is a prefabricated element that is installed in a similar way to a panel radiator. It consists of a galvanised sheet steel frame in which a multi-layer composite pipe (PE-RT/AL/PE-RT) is inserted and enclosed with a special heating mortar. The element is encased in cardboard paper. The maximum heat output is up to 210 W/m², which is higher than comparable products. 

Notes on storage and transport 

The SANHA® wall heating modules must be treated similarly to drywall panels on the construction site, i.e. protected from moisture in particular. The modules must not be placed on the connecting pipes. The modules are delivered on pallets. When transporting individual modules, bending must be avoided. They must therefore be transported on edge. Each module is labelled with corresponding instructions. This label must be removed during installation.