8 reasons for surface heating - always a pleasant temperature
More and more building owners appreciate the multiple advantages of surface heating. In addition to the familiar underfloor heating, systems in walls and ceilings are now also playing a more important role. SANHA offers both pre-assembled modules for wall heating and an extensive range of multilayer composite pipes, matching press and push-fit fittings as well as corresponding heating circuit distributors and heating connections.
This speaks in favour of surface heating and cooling
The floor, wall or ceiling can be used to emit heat or cold into the room. The building owner benefits from a variety of advantages. These include above all:
- pleasant radiant heat
- high comfort
- economical and environmentally friendly operation thanks to low system temperatures
- high energy-saving potential of up to 12 % compared to radiators
- good combinability with heat pumps and solar thermal systems
- hygienic and allergy-friendly indoor air due to lack of dust circulation
- Interior design freedom
- silent cooling of rooms in summer as an additional benefit
The last point in particular is increasingly desired by residents, especially in detached and semi-detached houses. This is why it is important to be familiar with different panel heating systems and their advantages. After all, only the system of panel heating integrated into the building structure makes silent cooling and thus a considerable gain in comfort possible.
The use of the floor is the most common solution. There are three systems to choose from:
- classic wet systems according to DIN EN 1264 as pipe systems on insulation board in wet screed (NB1) or pipe systems in insulation board with wet screed (NB2).
- dry construction systems as pipe systems in insulation board with dry screed (TB1), pipe systems in dry finishing board (TB2) - with or without additional insulation layer - as well as pipe systems on insulation board in mastic asphalt screed (TB3)
- special composite constructions of pipe systems on old subfloor in levelling compound (NB3)
In addition, the walls or the ceiling of the room can also be used. Here, a wet system - the pipe system in the wall plaster (NW1) or in the ceiling plaster (ND1) - is available. There are also dry construction systems: on the one hand, pipe systems in dry construction board (TW2 or TD1) and for wall panel heating, the pipe systems in substructure with construction board (TW1).
Wall heating from SANHA: Innovative surface heating
SANHA supplies, for example, a dry system with four wall heating modules of different heights, prepared ready for installation. These prefabricated elements made of a robust, galvanised sheet steel frame are installed in a similar way to a panel radiator. They are characterised by their particularly high heating or cooling capacity, a maximum flow temperature of up to 60°C and very simple installation.
Installation is possible on masonry, wood and drywall studs as well as on roof slopes. The surface can be painted or wallpapered directly. This allows it to be adapted to one's own living and furnishing style. The range is rounded off by the SANHA-Heat stainless steel heating circuit manifold and a wide range of accessories.
In general, all surfaces can be used for cooling rooms. However, it should be kept in mind that the cooling capacity varies greatly. For example, the ceiling is best suited for room-surface-integrated cooling, followed by the wall and floor.
The floor and wall coverings have a great influence on the power output - both for cooling and heating. They should have a low thermal resistance. The calculation of the surface heating or cooling system is done according to DIN EN 1264 and is carried out by a specialist.
Regulation of the surface cooling system
Compliance with certain control aspects is crucial for the safe operation of a surface cooling system. The focus here is on the water vapor dew point temperature and condensation. Harmful condensate forms on cooling surfaces if the temperature on them is too low. This is because room air always contains a certain amount of moisture in the form of water vapor.
This absorption capacity decreases as temperatures fall. The dew point is understood to be the temperature at which the room air has reached its maximum water absorption capacity. Therefore, the cooling water temperature must not be lowered arbitrarily in order to achieve a higher cooling capacity.
The correct consequence is that the cooling water in the system must not fall below a certain minimum temperature. This can be achieved in various ways in the systems commonly used today: Either the flow temperature is kept above the calculated dew point of the component surface or the cooling water flow is temporarily interrupted when the dew point is reached at the component surface.
Rooms in which the relative humidity already tends to be quite high, for example in kitchens or bathrooms, should generally be excluded from cooling operation. For this reason, too, individual room control with a dew point sensor is necessary for the cooling case. Only in a few exceptional cases it is possible to disregard humidity when controlling the system.
Mostly, the cooling of the living spaces is realised by means of a heat pump as so-called passive cooling. The ground or groundwater are particularly suitable as cooling sources. The temperature difference between the room to be cooled and the natural cooling source is used, for example, by a heat exchanger. Only the circulation pumps and the surface cooling system itself are in operation.
With so-called active cooling, energy in the form of electricity or gas is used to operate a refrigerating machine or a reversible heat pump. This type of cooling is mainly used when an even temperature in the rooms needs to be ensured and passive cooling is no longer sufficient.