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HUMIDITY CONTROL


Better IAQ starts with balanced humidity A


s awareness of indoor air quality (IAQ) grows, the conversation often centres on ventilation, fi ltration and pollutant control. Yet one critical


factor is often overlooked: humidity. It’s an invisible infl uence on health, comfort and effi ciency of indoor environments and a cornerstone of good IAQ. The HEVAC Humidity Control Group highlights that maintaining relative humidity (RH) within the optimal range, which is 40–60%RH with 10% margin on each side, is essential for both occupant well-being and building integrity. Deviations from this range can have profound consequences: Too dry: Dry air irritates mucous membranes,


increases susceptibility to respiratory infections, can help the spread of airborne-transmitted diseases and even impacts cognitive performance. Static electricity and material shrinkage pose operational challenges which can lead to production downtime and lost revenue. Too humid: Excess moisture fosters mould


growth, dust mites and microbial contamination, all of which degrade IAQ and trigger allergies and asthma. It can also damage the structure and fabric of buildings, stored products and materials as well as HVAC systems. Balanced humidity supports the body’s natural


evaporative cooling rather than mechanical refrigeration.


Ignoring humidity control can be a health and cost


defences, reducing the spread of airborne pathogens. Studies link optimal RH to fewer sick days and improved productivity, making a compelling argument for businesses aiming to create healthier workplaces. The HEVAC whitepaper states: “Maintaining the


level of indoor humidity between 30–70% RH is essential in spaces that human beings occupy as it allows them to function optimally.” (feta.co.uk) This reinforces the idea that humidity control is not optional but fundamental to thermal comfort and perceived air quality.


Humidity is embedded in thermal comfort


standards such as BS EN ISO 7730, which recognize its role in perceived air quality. Beyond compliance, humidity control aligns with sustainability goals: technologies like adiabatic humidifi cation can reduce energy consumption by leveraging


factor. Poor IAQ in work environments contributes to absenteeism, equipment failures and increased maintenance. In sectors like healthcare, cold stores, pharmaceuticals and data centres, uncontrolled and unmonitored humidity can even put critical operations in danger. Modern HVAC systems integrate humidifi cation and dehumidifi cation technologies, from isothermal steam systems to adiabatic solutions. Smart sensors and building automation enable real- time monitoring to ensure that RH stays within target ranges. Regular planned maintenance and inspections remain vital to keep systems running effi ciently and extending the products’ lifespan. As IAQ becomes a priority in building design


and retrofi t projects, humidity control has moved from a “nice-to-have” to a non-negotiable. With new standards emerging emphasising on occupant health and energy-effi cient solutions gaining traction, balanced humidity will become an important factor to consider. Contact: info@humiditysolutions.co.uk, call on 01372 571200 or visit humiditysolutions.co.uk to explore solutions tailored to your needs.


WE UNDERSTAND HUMIDITY CONTROL


Free site visits Quick turnaround on quotes Wide range of humidity control systems in stock Low energy solutions Free technical support on our products over the phone Full UK coverage for service and maintenance Close control of +/-1% relative humidity possible Award-winning experts with decades of experience


CONTACT OUR EXPERTS TODAY


E: info@humiditysolutions.co.uk W: humiditysolutions.co.uk T: +44 (0)1372 571 200


DOWNLOAD THE HVR APP NOW January 2026 13


"Humidity Solutions has very quick lead times, with most of their products being stock items and the reliability of their products is fantastic. The staff are always incredibly helpful, knowledgeable and eager to please with


a very 'can do' attitude" Emma Staniforth, INCA


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