Seeing beyond the myths
Each year, World Humidity Control Day – on 12 March – highlights the critical role that humidity plays in building performance, wellbeing, and energy efficiency. The day honours John Frederick Daniell, the pioneering British chemist and physicist who invented the dew‑point hygrometer, laying the foundations for modern humidity measurement.
As Managing Director of Humidity Solutions and Chair of the Humidity Control Group, I’m often asked why humidity control warrants more attention. The reality is simple: humidity influences almost every aspect of how a building operates, yet misconceptions persist.
Beyond the visible signs
A common assumption is that humidity becomes a concern only once visible issues – like mould – appear. In truth, problems often begin long before that stage. Low humidity can cause discomfort, static build‑up, and material deterioration, whereas excessive humidity encourages corrosion and microbial growth. Maintaining a relative humidity between 40% and 60%RH supports both occupant comfort and the reliable performance of equipment and materials.
Another misconception is that humidity management is relevant only to large or highly technical industries. In fact, it benefits organisations of every size and type – from data centres safeguarding sensitive electronics, to museums preserving priceless artefacts, and food manufacturers ensuring product quality and safety. Even offices, schools, and healthcare facilities experience improved comfort, productivity, and health outcomes when humidity is properly controlled.
The belief that humidity control is prohibitively expensive is also outdated. Modern systems are designed for energy efficiency, employing smart controls and adiabatic technologies that minimise consumption. Beyond immediate utility savings, stable humidity reduces downtime, waste, and material fatigue – extending asset life and delivering tangible long‑term value. Humidity may be invisible, but its influence is immense. Effective control supports human wellbeing, protects assets, and drives energy performance. As organisations intensify efforts to meet net zero goals, efficient humidity management is becoming a cornerstone of sustainable building operation.
At Humidity Solutions, our team advises clients across manufacturing, healthcare, heritage, and commercial sectors on assessing and optimising indoor environmental systems. By applying the science of humidity, facilities managers can achieve environments that are safer, more resilient, and cost‑effective.
World Humidity Control Day offers the ideal opportunity to review your building’s performance and recognise how controlled humidity underpins wellbeing, efficiency, and sustainability. It’s a reminder that effective humidity management isn’t just about air – it’s about creating better places to work, live, and thrive.
John Barker
Managing Director, Humidity Solutions
Chair, FETA Humidity Control Group
