Technical details and advantages

Technical details and advantages

Key advantages compared to conventional systems

Capillary tube systems made from PP offer their users in the following areas
considerable advantages, compared with conventional technical solutions:


Optimum comfort

Capillary tube systems work draught‐free and absolutely noiseless. Din această cauză, adesea este denumit “sistemul silențios de răcire”.Thus it is oftenreferred to as “systems of silent cooling“.
The exchange of energy by radiation corresponds to the natural conditions and is felt to be very comfortable. In addition, the surfaces have a very even temperature profile without major fluctuations, due to the small interspaces between the ‐ capillary tubes.

This means, every user finds the exact identical conditions and the “traditional” discussion on whether workplaces are better or worse regarding the indoor climate is now a thing of the past.

No negative effects on health

Contrary to the water‐carrying capillary tube systems, conventional air conditioning systems use cooled air to remove the heat load. In conventional systems large volumes of air are blown into the rooms at temperatures well below normal level.

This reduces not only personal comfort, but is also very often associated with health risks. Apart from the draught risk and noise disturbances, very often poor hygienic conditions in the air duct network are an issue.

Individual controlling with short reaction times

Each zone can be individually and easily controlled by room temperature controllers.

Setpoint adjustments lead to an appreciable change of the room conditions within a few

Capillary tube systems are very easily adapting to the intelligent home concept, with the intelligent thermostats. These systems are using special internet applications, making possible the heating and cooliong system operation, with very economical energy conditions.


Invisible/hidden technical elements

Capillary tube systems have a small structural height and, for this reason, they can be
fully integrated into room enclosing surfaces. Visible technical elements, such as radiators or room cooling equipment, are no longer required. Capillary tube mats are permanently invisible, even in such cases, where they are only covered with a thin layer of plaster. Colour change of the plaster surface, the so‐called copper shadows (which frequently occur when metal tubes are plastered) will not happen with capillary tubes, made from polypropylene.

Maximum flexibility

Capillary tube mats can be custom‐made in almost any dimensions and mat types.
They have such a high degree of flexibility, that they can be easily adapted even to vaulted
surfaces, or individual ceiling designs. The integration of cut‐outs in the mat for installation
parts such as lamps, air ducts, fire extinguishers etc. is possible and very simple. Capillary tube mats offer architects and planners, practically unlimited freedom with regard, to design and layout.

Minimum space requirement

Not only the capillary tube mats, but also the entire system requires considerably less space, than conventional technical systems. This fact becomes particularly evident, when making comparisons with common ventilating and air conditioning systems. In order to transport a capacity of 10 KW, an air ventilation unit requires an air duct with the dimensions of 530 x 400 mm (spreading 8 K at 5 m/s). As water is much more suitable for energy transport, capillary tube systems require only a PP pipe DN 50 (da = 63 mm) for the same capacity.

Convenient retrofitting

The small installation height and the low weight of capillary tube mats (with water max. 900 g/m²) do not require any special supporting structures and allow quick and trouble‐free retrofitting, into existing ceiling elements. Even when local conditions do not allow the installation of suspended ceiling, you do not have to do without a cooling or heating ceiling, when using capillary tube mats. In such cases, the capillary tubes are plastered directly onto the bare concrete ceiling. As a result, the loss in height in the room is only 10 – 15 mm.



Exceptional quality assurance

Capillary tube mats are manufactured from high quality special polypropylene.
Each mat is subjected to quality control in the factory; each mat runs through a pressure test at 20 bar air pressure, and is then intensively checked in a water bath for any possible

This test pressure corresponds to approximately ten times the operating pressure. After mounting, the installed mats are again pressure tested on site at 10 bar. This pressure test is performed with air, and water in accordance with a method specified by the producer.


Due to the small diameter and the surface tension of the water, the capillary tubes of the
mat are self‐venting.

Even with flows in a vertical and downward direction, the water
drives the air bubbles in front of it, during the filling operation -as well as during the start‐up of the system later on.

For this reason, it is not necessary to take the angle of inclination into account, when installing the mats in the ceiling.

Easy to repair

If a capillary tube mat is damaged, for example during drilling, water would leak out until the system is depressurised. This leakage water volume depends on the size of the expansion vessel and is normally only a few litres. As a rule, the damaged capillary can be easily uncovered, repaired with a soldering iron or welding mirror, and then plastered over. The necessity of replacing complete surface elements, as would be the case with conventional tube systems, cannot occur with capillary tube systems.


Safe solution

With capillary tube systems, the water circuit through the capillary tube mats is always separated from the primary water circuit, by a stainless steel heat exchanger. In the secondary circuit, only corrosion resistant materials such as plastic, red brass, brass and stainless steel are used. Unlike other systems available on the market, with the application of capillary tube technology, the formation of deposits in the pipes -resulting from corrosion is technically impossible, even with oxygen diffusion, through the polypropylene tube wall. Sludge caused by micro‐organisms can also not occur, due to lack of phosphor and nitrogen combinations. Also -limescale deposits at operating temperatures, between 16 and 40 °C are physically ruled out. In capillary systems, it is therefore ensured that water remains absolutely free of solids, even after decades of operation.




As a rule, the investment costs are not substantially higher, than those for conventional ventilation and air conditioning units. If the capillary tube ceiling can be used also for heating purposes, for example in well‐insulated office buildings, the investment costs are even more favourable. In case of cooling, the consumption and operating costs are up to 40% lower compared with conventional air conditioning units. A key factor here is, the transport costs for the cooling energy, by means of air (high expenditure) or water (very economical). Capillary tube systems are almost maintenance‐free, and have only 1/5 to 1/7 of the pressure loss compared with conventional tube systems. Even compared with other cooling ceilings on the basis of copper cooling elements, capillary tube systems offer considerable cost advantages, where the user does not face any losses with regard to the function.


Space saving

The building owner gains up to 15% usable (effective) surface, compared with conventional air conditioning units, in buildings of a similar size.

The reason is that the ceiling voids only have to be 10 to 15 cm high (possible reduction in storey height) and that machine rooms -as well as shafts, can be made significantly smaller.

This is a considerable advantage, especially where the planning of new construction projects is involved.

Long life service

Long period creep tests and material tests have shown, that a long period creep resistance of more than 50 years can be expected.

Capillary system’s customers receive for each a ‐ mat, in accordance with the insurance terms and conditions, a 10 year full warranty, which covers not only the replacement of the damaged product, but also the installation and removal as well, as the regulation of consequential damage.

This warranty applies practically worldwide and is covered by a reputable insurance company. In this way, all risks are avoided both for the plant constructor -as well as for the building owner.


Environmental protection

The temperature control of surfaces with capillary tube mats is much more efficient, compared with conventional tube systems, due to the small capillary tube clearance of 10 and 15 mm, respectively, and the large surface.

This leads to an optimum energy transfer to the room. Consequently, only very small spreadings, between the water temperature and the room temperature are necessary. Further, energy savings result from the fact, that the room temperature as perceived by the user -with the use of radiation cooling and radiation heating, is about 2 to 3°C lower or higher, respectively, than the actual room air temperature. Significant energy savings when using capillary tube systems, are evident here also.

For example, energy saving for a cooling ceiling -with displacement ventilation, can amount up to 40% compared with an “air‐only‐system”. Furthermore, the production of capillary tube mats is absolutely pollutant‐free. No contaminated exhaust air or contaminated waste water results in the process. All production waste can be 100% recycled and used again.

The production of polypropylene requires considerably less amounts of primary energy, compared with other materials. Metals requires 5 ½ times more, and aluminium even 8 times more primary energy.