AHUs
Creating the perfect environment
In the search for optimal indoor air quality, the role of air handling units extends beyond mere temperature regulation. A critical yet often overlooked aspect is their ability to manage humidity levels. Simon Marshall, head of business development at Humidity Solutions, explores the nuances of humidity control within AHUs, highlighting its signifi cance and the innovative solutions available to address common challenges.
C Simon Marshall
As we advance in our
understanding of indoor air quality, the signifi cance of humidity control within AHU systems cannot be overstated.
ooling coils in AHUs are the unsung heroes during the humid summer months, effi ciently extracting excess moisture from the air. This dehumidifi cation process is vital for maintaining comfortable and healthy indoor environments during this period. However, the winter presents a challenge. As the cold fresh air is heated, moisture levels drop, leading to dry conditions that can trigger various issues, from respiratory discomfort to static electricity. This contrast highlights the importance of incorporating humidity control in the initial design phase of AHUs, ensuring they are equipped to address both extremes. The discovery of inadequate humidity levels in operational AHUs, whether newly installed or long-standing, is not a dead end. Tailored solutions, such as bespoke steam lances, can be introduced to mitigate these issues. Designed for compact spaces, these lances provide precise humidity adjustments, preventing the common problem of ductwork dampness and
ensuring that even the most constrained systems can achieve optimal humidity levels. Maintaining the proper humidity level is not just about comfort; it’s a health imperative. In environments such as hospitals and offi ces, where the spread of viruses can cause signifi cant issues, humidity levels between 40-60% are crucial. This range is scientifi cally proven to reduce the transmission of common colds and other diseases, making humidity control a key component. Moreover, ensuring a consistent supply of fresh air within buildings is imperative, especially during the colder months. The legal mandate requires a minimum of 5-8 litres per second of fresh air per person in indoor spaces. This constant infl ux of fresh air during winter necessitates integrating eff ective humidifi cation systems to counteract the naturally low relative humidity levels typical of this season, thereby maintaining the optimal humidity range for health and comfort.
Humidity Control helps keep valuable artwork in optimal condition 20 April 2025 •
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