Frequently asked questions about our products and dehumidification
Challenges with moisture - Typical questions about moisture management
Answer: The energy efficiency of a dehumidifier is measured in the energy consumption to extract a kilo of water from the air, in the climate in which it is to work. There, the capacity is stated in the number of kilograms of water per hour, then it is multiplied by the dehumidifier's power consumption, so you get the cost of dehumidifying! It is important to use the right temperature and humidity level when comparing! Especially if you also want to save energy by lowering the temperature in the room. Good moisture level in most premises is below 60% RH. Then you avoid mold and corrosion. All older techniques require more energy at lower temperatures. Airwatergreen hot condensation technology is the only one that is completely independent of the climate in which the dehumidifier works. With the FLEX series, it only costs 2 KWh to extract 1 kilo of water from the air according to the test by the State Testing Institute, with the REX series about 1.5 KWh per kilo of water.
See diagram of Statens Provningsanstalt (SP) (RISE).
If you would like help with calculating moisture or life cycle calculations (LCC) for the next dehumidification purchase, please email us at email@example.com
Answer: The important factor for corrosion is the humidity level at the pipe. If the pipe is colder than the air in the room, the dew point at the surface of the is lower than in the air and moisture in the air will begin to form on the pipe with corrosion as a result. Just like on a soda can on a hot summer day. We can calculate the dew point and configure the dehumidifier to use sensors and work to maintain the correct humidity level to avoid corrosion. In this way the dehumidifier works efficiently and there will be no further corrosion or mould.
Dew point diagram
Answer: Yes, we can do a moisture study using sensors. We place these moisture sensors in selected positions for a couple of weeks and can, based on data from these sensors, present an assessment of the moisture levels over time. Based on these data, we can advise on how to proceed depending on the type of moisture challenges using a calculation methodology that we have developed.
Answer: We have the equipment and can help you with the installation and if necessary install a drainage pump that takes out the water from the space if it is under ground and there is no floor drain or drain.
Answer: No, you can lower the temperature. Our technology is equally effective in cold air as in hot air. This has proved very successful in churches and buildings that are not always used. No unnecessary heating is needed and our FLEX and REX keep the humidity at the right level. This means that you can save energy both from lower heating costs and from a more efficient dehumidifier.
Dehumidification methods - Which is best depends on the conditions. Here we try to describe the advantages and disadvantages of the various methods
Warm condensation is a technique where, in a first step, the moisture is trapped in a a desiccant, an adsorbent which is then dried out in a closed warm condensation process. Water and dry air is produced in this process. Dry air is produced at the machine and no connections other than drainage for water is needed. This makes the installation simple and very cost effective! All energy supplied stays in the room and not ventilated out. With Airwatergreen's technology, which makes the dehumidifier work equally efficiently in all climates regardless of temperature and can therefore dehumidify even in freezing temperatures.
How the warm condensation method works is described in detail in this report Modeling a novel sorption dehumidification method - written by Per D
Keeping the air warm can hardly be considered as dehumidification method because no moisture is removed from the air. However, heating the air will lower the relative humidity (RH) level as hot air can "hold" more humidity than cold air. No water is removed from the building's air, which means that the heating must be kept running forever to avoid a too high relative humidity level.
A study done at Uppsala University show that maintaining the same relative humidity is about 5 times more energy-consuming, than using dehumidification. If you want to read the study, it is available for download HERE.
Ventilation should not be considered as a method for dehumidification since no water is removed from the air. Ventilation is entirely dependent on the outdoor climate and how the temperature is in relation to the temperature in the space that has challenges with moisture. Maybe you bring in more humidity to the building instead of removing it?
Ventilation is sometimes used because it is considered a low cost and simple solution. But ventilation can create more problems than it solves! A typical situation when ventilation releases warm humid air into a cool space such as the crawl under houses during the summer or into subsurface storage areas.
Water drops are created on a cold surface - this is generally known.
This is due to the fact that cold air cannot contain the same amount of moisture as hot air. This fact can be used in dehumidification as it actually removes the water from the air. But at the same time, this phenomenon is also the reason why corrosion and mold occur in buildings and constructions!
To use cold condensation as a dehumidification method, the air must be reheated after condensation. Otherwise, the relative humidity will be at the same high level.
This means that this method can only be used at certain temperatures to avoid ice buildup at the cold surface.
Sorption dehumidification is considered the modern dehumidification method that was created in the 1950s in Sweden to dehumidify under Swedish climate conditions.
Over the years, this method has been used in many installations. The method involves catching the moisture in the air in a slow rotating wheel to dry the wheel with hot air in step two.
The warm air then catches the moisture, which is then typically led out through a hole in the wall.
Installation can easily become costly depending on how you can discharge the air and energy is lost through the hole in the wall.
Questions about the products - FLEX, REX, Blackbox
With the new Temp Guard function in the FLEX you can ensure that the room is maintained at a suitable temperature above freezing. This means that the FLEX deliver both dehumidification and can step in as an element if this is needed. Two solutions in one!
Read more about Temp Guard
To be completely certain, we let the Statens Provningsanstall (now RISE) do a comparative test of our dehumidifier and a traditional sorption dehumidifier. The result of that test shows that our dehumidifiers need half as much energy to reduce the same amount of water from the air.
Do you want to read the whole test? Klicka HÄR.
The water taken out of the air is delivered from the outlet on the side of the dehumidifier. A hose can easily be connected so that the water can be delivered to a drain or a tank. If no drain is available, a containers can be used.
we have designed a container for the FLEX that at the same time can act as a trolley on wheels. This is typically used in buildings without a drain.
FLEX leans to create self-drainage. The water runs out of the machine without having to use any pump. This reduces energy consumption and minimizes the number of moving parts.
If the green lamp changes from a steady light to flashing then the dehumidifier needs service. There are instructions in the manual under Chapter 6 - Service. Or contact our support at firstname.lastname@example.org.
Yes, both the FLEX and the REX Integrate models are prepared for communication via Modbus to be control from a monitoring systems. We have a number of such installations up and running.
The Cloud model can be connected via WIFI.
The dehumidifier status is available, as well as data from sensors that record humidity (RH), temperature, etc., available.
We recommend replacing granules once a year to maintain full capacity of the dehumidifier. The dehumidifier will inform when the time is right.
This is included as a delivery in our Service agreement.