Natural indoor climate control

Natural indoor climate control

Dew point cooling

AquaClima builds innovative climate control systems that combine air exchange and cooling in one system. It is the latest development in systems that refresh, heat and / or cool air quality and indoor climate in a more natural and human-friendly way - and also do this more energy-efficient and with less costs.

Nature provides many examples of organisms that use evaporation with water as a "cooling strategy". A close example is provided by the human body, which chooses the same strategy to regulate the temperature: with the release of moisture ("sweat"), heat is efficiently removed, so that the body temperature remains within healthy values. Our body therefore sweats to cool down.

AquaClima is building a prototype that further reduces and economizes a previously patented cooling and air exchange installation with existing and new technology. The physics principle behind AquaClima is called "dew point cooling." Dew point cooling is based on the natural capacity of evaporating water to cool air. The system consists of a number of separate double-channel plates. In one channel, air is cooled by evaporating water in another channel. Aspirated outside air ("primary air") is cooled in the heat exchanger. A second air stream ("process air") flows in the opposite direction. This process air absorbs the evaporated moisture. This return air flow is discharged from the building to the outside world. A major advantage of this type of cooling is that if the temperature rises during the day (for example due to solar heat), the absolute humidity remains the same, while the cooling capacity of the dew point cooler increases with constant energy consumption. So the warmer it gets, the better it works.

Compared to a previous test setup, the indoor temperature - even at high outdoor temperatures and high humidity - can be reduced to eighteen degrees.

Fresh air

An important advantage over air conditioning is that the AquaClima system always supplies fresh air, where air conditioning reuses used air again and again. The advantage here is that the temperature of the cooled air follows that of the outside air remotely; there is a pleasant cooling - in contrast to the characteristic "temperature drop" in air conditioning, where people are inclined to close windows and doors to prevent energy loss (a "roaring air conditioner"). This creates an indoor climate in which viruses, bacteria and fungi thrive, and colds and allergies arise.

Areas of application


Homes, care homes and sheltered homes from around 2005 can literally overheat. There is no need for a high outside temperature to boost the temperature values in well-insulated and airtight new-build homes - the sunlight radiation in particular is sufficient for this. Even with an outside temperature of 16 to 20 degrees, the mercury behind the windows can easily rise to 30 degrees in clear weather, especially in houses with insulating high-efficiency glass.

With the Aquaclima heat exchanger / cooler (so-called "WTW-coolers"), households can easily be heated and cooled in a healthy way with 100% fresh air.

Hospitals, schools, care institutions and homes

In many companies and institutions we find poorly ventilated interior spaces. Infection via climate control systems and people traffic sometimes paralyze entire departments for a longer period of time. (think of "hospital bacteria" MRSA and Norovirus) Investing in more healthy as well as safer cooling and air exchange systems á la AquaClima results in better prevention and better hygiene.

Business halls, offices, shopping centers, sports halls

More complex business environments are optimally equipped with flexible, modular air handling units (AHUs) from AquaClima. Efficiency, hygiene and (climate) efficiency are paramount here. (see also "hospitals, schools, care institutions and homes")

Complicated business environments can also be configured with efficiency, hygiene and (climate) efficiency with flexible, modular air handling units (AHUs). (see under "hospitals, care institutions and homes")


We can offer support for a multitude of industrial processes. For example, we can control the supply of fresh air or design cooling towers more efficiently to prevent legionella


Air conditioning uses 13% of the total energy requirement of cars; relatively more in electric cars and hybrid cars. Due to its compactness and energy efficiency, AquaClima is the preferred replacement here.

Poultry farms

Water spraying is used here for the necessary cooling. However, this has the side-effect that the administration of higher amounts of antibiotics is required for a healthy population. However, the antibiotics in question are for the most part the same as those that are also administered to people. It has been found that leaching into the environment (manure, urine, rinsing water) is extensive and the long-term damage is considerable. Once such "medicine remains" have been flushed into the surface water and the soil, all kinds of bacteria and germs appear to be able to "learn" from the washed-out penicillin residues. They become "resistant"; making more and more germs and bacteria resistant to their effects. Since the amounts of antibiotics that are leaching into the environment are enormous (partly also preventively given), the agricultural industry therefore bears great responsibility for the problem of bacterial resistance. Pressure from pressure groups and government legislation and resulting restrictive measures are increasingly jeopardizing the economic feasibility of the sector. More natural climate management with AquaClima can reduce the need for antibiotics in the chain.

Pig farms

Here too, the aforementioned problems of (preventive) administration of antibiotics, leaching in the environment and subsequent growing bacterial resistance apply. Pigs are only fertile at an ambient temperature of 19 to 21 degrees, so that large sums of money are involved for agricultural entrepreneurs. Because pig populations (just like people) are poorly resistant to cooling by spraying and air conditioning is not economically feasible, climate management with AquaClima is an excellent solution here.

Data centers and computer systems

Cooling these centers - sometimes the size of many soccer fields - is a huge cost and also causes a large CO2 emission. Large profits can be achieved here in terms of environmental friendliness and profitability.

Single-glass showrooms

The excess heat combined with a shortage of indoor ventilation often cause an unhealthy feeling and unpleasant working environment. AquaClima is also an energy-efficient, sustainable, cheap and healthy solution.

Caravans and mobile homes

Caravans previously lacked good cooling, mainly because the high energy demand of air conditioning exceeded the supply options. The compactness, efficiency and low energy demand of AquaClima make it an excellent solution: with less energy, cooler air and healthy cooling.

Low energy bill

Furthermore, the AquaClima system uses little power, partly because there are few rotating parts. For example, there is no compressor; a (small) pump, a fan and a process air valve that controls the cooling capacity (by increasing or decreasing the amount of process air). That means low energy consumption, low sensitivity and maintenance costs for a cooling installation.

Info for investors

The prototype

The AquaClima prototype is built with AutoCAD software and an advanced 3D printer by the company Boost Ontwerp from Goes. In the design, the latest research results from research & development and literature are translated into adjusted specifications. Investment company Impuls Zeeland was the first to promise a donation for the realization of the AquaClima prototype.

AquaClima is looking for partnerships at many levels. In the words of project manager Rein Berben: “people who can enlarge the project.” The three current project participants / shareholders will house the technology, the air freshener and the dew point cooler in the main BV; in the sub-BVs the sector applications. It is obvious, for example, to supply air handling units (AHUs) as semi-finished products to manufacturers of air treatment equipment, installation agencies and the like. For the construction of the prototype and the subsequent phase between prototype and large-scale production, further investors and patents are searched and applied for. According to trademark and patent office Arnold & + Siedsma, this concerns three things that will still have to be patented, especially those that keep the device small and efficient.


•             AquaClima bv


•             postadress: Narcisstraat 12 te Putte


R. Berben

0031 62 555 1189

Legal issues:

Steven M. van der Minne