Humidity optimization

Indoor humidity recovery with the CASA Genius ventilation unit

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Relative humidity is a significant factor affecting the comfort of living and the well-being of the building.
Intelligent humidity optimization enables healthy and comfortable indoor climate, safe humidity levels for the building and energy efficient ventilation and cooling.

Problems with dry air

During winter, indoor air is often too dry, causing dryness in mucous membranes, eyes, and skin. 

This can lead to uncomfortable symptoms and increase the risk of respiratory illnesses, as viruses and bacteria spread more easily in dry air.

Dry air can also cause cracks in building structures.

Problems with humid air

In summer, humidity levels can become excessively high. Too humid indoor air can feel uncomfortable and, among other things, increase energy consumption for cooling.

Humidity not only makes the environment unpleasant but also creates ideal conditions for the growth of microbes and mold, which can jeopardize both the residents' health and the longevity of the building.

Traditional humidification

with ventilation and humidifiers

Indoor humidity conditions are traditionally improved using ventilation and/or humidifiers. Ventilation removes moisture generated indoors, but in winter, it can dry the indoor air excessively. In summer, outdoor air is already humid, and traditional ventilation systems do not prevent moisture from entering indoors with the incoming air.

Dry indoor air can be humidified with humidifiers, but they require their own space in the home and consume energy. Additionally, they cannot dehumidify excessively humid indoor air

Humidity optimization

with Sorption Technology

Sorption technology enables the heat exchanger in a ventilation unit to recover up to 80% of the humidity from indoor air. Humidity automation continuously monitors and adjusts indoor air humidity as needed.

In dry winter air, it can increase indoor humidity by approximately 15–20%, and in summer, it can similarly reduce indoor humidity by 15–20%.

Humidity recovery and sensors are built directly into the ventilation unit, allowing the system to operate fully automatically without requiring any additional devices in the living space.

  • Counterflow heat exchangers only remove moisture.
  • Rotary heat exchangers recover approximately 10–20% of humidity.
  • Sorption rotors can recover up to 80% of humidity.
  • CASA Genius intelligent automation controls the sorption rotor,
    adding or removing humidity from indoor air as needed.

Benefits of humidity optimization

In winter:

  • Indoor air humidity is approximately 15–20% higher.
  • Healthier for both people and structures.
  • Eliminates excessive humidity spikes caused by human activities (intelligent humidity automation).

In summer:

  • Indoor air humidity is approximately 15–20% lower.
  • Enhances cooling efficiency and reduces energy consumption (with condensing cooling).
  • More comfortable for people and safer for structures.

Additional benefits:

  • Minimizes the need for defrosting in ventilation.
  • Saves energy (better annual efficiency).
  • Airflows are always balanced.

Improved energy efficiency

In addition to optimal humidity control, sorption technology improves the functionality and energy efficiency of the ventilation unit.

Due to the humidity recovery, the heat exchanger does not condense. In other words, the ventilation unit normally does not need defrosting cycles, which improves the annual efficiency of the unit.

Air flows also remain balanced, and the unit does not produce excessive negative pressure during frost periods. If the apartment has condensing cooling (e.g. an air-source heat pump), reducing indoor humidity makes cooling more efficient and reduces the energy consumption of the cooling unit.

Humidity optimization available for the following models

CASA Genius Sorption models

CASA R5

CASA R7

CASA R9

CASA R15

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Document Article Document type Date Download
Swegon CASA R5 Sorption - Technical catalogue (pdf 6.58MB) GENIUS Technical catalogue 17/12/2024
Swegon CASA R7 Sorption - Technical catalogue (pdf 6.58MB) GENIUS Technical catalogue 12/06/2024
Swegon CASA R9 Sorption - Technical catalogue (pdf 6.55MB) GENIUS Technical catalogue 22/04/2024
Swegon CASA R15 Sorption - Technical catalogue (pdf 6.52MB) GENIUS Technical catalogue 25/06/2024