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Wall-heat

General information on wall-heating


Hot water may not only be led in pipes in the floor, but also in the walls. Such a heating structure is referred to as wall-heating. In the case of wall-heating, the hot water of 35-40°C temperature is circulated by a pump from the heating unit to the distribution-collection joints located near the rooms to be heated.

The heating water is flowing from the distribution joints and is circulated in the small diameter plastic pipes built in the plastered walls and during circulation it transfers heat to the wall, then the cooled water returns to the heating unit through the collectors.

By warming up the walls, this heating system provides an extremely pleasant feeling of warmth, by which (based on researches on the sense of heat) it far outdoes in performance the heating systems using radiators. Unlike the heating systems comprising heating elements in the case of wall-heating the heat radiation balance is created between the walls and the persons staying in the room, ensuring an optimal feeling of comfort, and establishing a constant temperature distribution from the floor up to the ceiling.

The system developed for wall-heating is perfectly suitable to cool buildings and rooms in the summer.

The wall-heating/cooling systems are primarily installed on the inside of the outer walls of buildings. In case these surfaces are not sufficient inner walls are also used. Moreover, they may also be fitted on the ceiling.

The most remarkable advantages of the ZIMENT® wall-heating systems are: energy saving, noiseless, aesthetic, draught-less, economical, modern, and easy to install.

The essence of the system is that it joins the pipes at the connection points (of pipes and fittings) using a unique solution.

The pipe can be connected manually to the fitting using a simple tool. The end of the pipe is expanded before connecting, which makes it possible to fit the pipe on the stub of the small distributor. The assembly is outstandingly simple, tightness is safe. Another advantage of the system is that the price is lower than that of the techniques used up to now.

Large surfaces can be heated at low temperatures using wall-heating, so efficiency and the feeling of comfort increase.

Wall-heating can also be used independently but it is usually combined with floor heating in rooms with cold floors; however that is not necessary and is only optional. In this case we talk about floor temperature adjustment as the increased heating surface always results in lower temperature of the heating water and the floor. The same applies to the heating of the ceiling, since this way, the combined application of heating systems increases the feeling of comfort. Of course, in children's rooms and in bedrooms, where you spend longer periods of time relaxing and sleeping, the use of floor heating is not recommended due to health issues.

 

Basic structure of the heat-generator and heat-transferring appliance

 

ZIMENT® – wall-heating has unified modern materials and fixings into one system, and so its use and assembly are economic and cheap.

Besides its several advantages, some disadvantages should also be noted; as in case of all wall-heating system, extra care should be taken to avoid the pipes when putting objects such as pictures and shelves on the walls in the future.

 

During the construction of the wall-heating system it is recommended to take a photograph or make a layout drawing of each wall in each room. However, if the pipe is damaged by a nail or a drill, it can be repaired locally by a small addition and the broken wall surface can be restored fast.

The above mentioned disadvantage may later be experienced not to be so serious, because if any objects, pictures or shelves need to be fixed onto the wall, this can be done simply. The location of pipes can accurately be defined later by using a small thermo-sensitive tool.

 

Thermometer

 

This can be done by heating up the system to 40-45 °C for 10-15 minutes, and finding the location of the pipes using the small thermometer. The heating should then be turned off if it is not needed, e.g. in the summer, so the drilling and fixing can be done without damaging the system.

 

The ZIMENT® system, the pipes, and fittings have an ÉMI licence (ÉMI license No.: A-88/2005), therefore, the wall-heating/cooling system is used safely. The wall-heating system has been established according to the requirements of the standard MSZ EN 1264.

Hydraulic and heat-technology parameters of the system have been inspected by the Building Energetics Department of the Budapest University of Technology for two years. Based on the inspection results it can be stated that the ZIMENT® system meets the level of the best solutions known today.

 

Pipe layout on the wall

 

General condition issues, feeling of comfort

The general conditions of a person living in an established living space depends on several factors. The group of factors defining well-being - state of health, mood, colours, odours, noises, light conditions, temperature sensation and humidity - together are called the feeling of comfort. From all these, our task is to provide comfortable temperature sensation. Wall-heating combined with floor temperature adjustment can provide the best possible temperature sensation if designed well and implemented professionally. If you choose the ZIMENT® system, you pay a favourable price for the best possible technical content during the implementation. Assembly time is shorter as a result of the applied modern technical solution.

The system is suitable for heating buildings with light construction and slanting attic roofs. In these cases a heat mirror of extruded metal sheets instead of rails helps fixing the pipes.

Temperature sensation – resultant temperature – sensation of draught

All the factors determining general well-being and more specifically, the feeling of comfort should be treated as equally important. Let us take a closer look at the issue of temperature sensation:

Temperature sensation is determined by temperature (resultant temperature in particular) and the draught of the room.

When inspecting heating and cooling solutions, the issues of draught and temperature should be taken into account together. Temperature can be influenced by heating or cooling. Heating and cooling systems can be classified as follows: convectional and radiating heating systems. Convectional solutions always presume light movements of air during their operation, whereas radiating heating systems operate whether or not there are any movements of air (of course, there are no purely convectional or radiating systems). Radiating heating - e.g. wall-heating - always provides a pleasant temperature sensation. The temperature sensed in rooms designed for a longer stay is the resultant temperature. Resultant temperature can roughly be calculated as follows: (radiating temperature °C + air temperature °C)/2

Radiating temperature is the temperature of surfaces bordering the area according to weighted average, and the air temperature is the temperature of the air in the room. The relation shows that the higher the radiating temperature, the lower air temperature is needed to get the same resultant temperature. An apparent method to increase radiating temperature is to use wall-heating.

Economical issues

The heat loss produced by a heated building is the result of transmission and filtration heat losses. As the moving power of these heat flows is made up of ventilation and the difference between the outside and inside temperature of air, if lower inside air temperature is applied, a more economic solution is received. (if, for example air temperature applied is 1 °C lower, 5-8 % energy-saving can be attained). If wall-heating is used, the temperature of the room can be reduced by 1-2 °C. Therefore, the same building can be operated by using 10-15% less heating energy by using wall-heating.

Modern economical heating systems operate based on the view a room should be heated as long as someone stays in it. So when you leave the room you switch off the lights and "turn off" the heating. To be able to do this, a solution is necessary which can keep up with the rapid changes in users' demands. Due to its small heat capacity, the wall-heating system is the most suitable for this requirement.

ZIMENT® offers a complex controlling solution for its wall-heating system, which is capable of programmable operation of each of the zones individually and of the application of heating-cooling thermostats in each room.

Applied automation is only limited by your imagination and your wallet. The basic panels of the system are suitable for adopting your future ideas of expanding the control.

Environmental issues

An energy-saving system is environmentally friendly in itself, as it "saves" the fossil energy supplies of the Earth and produces lower emission of harmful substances. A further advantage of wall-heating is that it is operated by low-temperature heating water, so it can be excellently used with condensation furnaces or equipment using alternative energy (geothermic energy or solar techniques).

The lower the temperature of the prepared heating water, the more efficiently these equipment operate.

Other advantages of wall-heating/cooling

ZIMENT® wall-heating system can also be used for cooling in the summer and has the same advantages as heating. Besides the advantages in comfort, energy-saving, health, and environment protection, ZIMENT® wall heating system also complies with aesthetic requirements because the heating system remains invisible in the room. An energy-saving option is to equip the system with a condensation furnace. Since in this case the temperature of the fume is low, approximately 50 °C, whereas that of traditional furnaces is 150 °C. The difference is 100 °C, which can be gained for our heating system in terms of heat quantity. However, in this case, it should be taken into account that these types of furnaces are more expensive than traditional ones. However, the pay-off period is much shorter than in the case of e.g. solutions using heat pumps.



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