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AIR HANDLING UNITS


IoT-enabled air handling units and the retrofi t opportunity


In the global push toward decarbonisation and smarter buildings, industry attention has focused on high- profi le technologies such as heat pumps, renewables, and building management systems. Yet one of the most critical assets in commercial and industrial facilities continues to be overlooked: the air handling unit. When combined with modern IoT sensors, AHUs present a powerful, cost-eff ective opportunity for retrofi t projects. Rashel Pibworth, director of HALO NEXUS explains


A


HUs regulate and circulate air to maintain temperature, humidity, and indoor air quality. However, many existing systems still rely on


outdated control strategies, often limited to fi xed schedules and reactive maintenance. IoT-enabled monitoring is changing this, delivering improved visibility, performance, and effi ciency.


The retrofi t opportunity


Retrofi tting existing buildings is one of the most eff ective ways to reduce emissions, but projects are often constrained by cost, disruption, and compatibility with legacy systems. Enhancing existing AHUs with IoT sensors off ers a minimally invasive solution with immediate returns. Unlike traditional building management


upgrades, which can require complex integration and proprietary systems, IoT solutions are fl exible. Devices can be installed using simple plug and play deployment, connecting via WiFi or 5G without extensive infrastructure changes. This reduces installation time and cost, making IoT ideal for live environments. HALO NEXUS, part of HALO HVAC Group, supports


this transition by holding stock, providing technical support, and delivering solutions across sectors including food production, pharmaceuticals, freight, insulation manufacturing, and data environments.


IoT vs traditional building management systems


Building management systems have long dominated HVAC control, but they are often closed and proprietary. This creates a form of monopolised control where upgrades and integrations depend on specifi c vendors, increasing cost and limiting fl exibility. IoT removes these barriers. Systems are open


and decentralised, giving operators full access to their data without reliance on a single provider. Sensors connect wirelessly via WiFi or 5G, eliminating the need for hardwired infrastructure and enabling rapid deployment. A key advantage is longevity. Modern IoT sensors


are designed for ultra low power consumption, with battery life of up to 12 years. This signifi cantly reduces maintenance requirements and ensures long-term reliability.


Retrofi tting existing buildings is one of the most eff ective ways to reduce emissions, but projects are often constrained by cost, disruption, and compatibility with legacy systems. Enhancing existing AHUs with IoT sensors off ers a minimally invasive solution with immediate returns


By leveraging these strengths companies are able to deliver scalable, future-ready solutions that are faster to deploy and easier to manage than traditional systems. Predictive maintenance and performance IoT transforms maintenance from reactive to


predictive. Continuous monitoring allows early detection of issues such as fi lter blockages, airfl ow imbalance, or fan degradation. Maintenance is carried out only when needed, reducing downtime and cost while extending asset life.


Energy effi ciency and control HVAC systems are a major contributor to building energy use. IoT sensors provide real-time data that enables precise control of airfl ow, temperature, and


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humidity based on demand. This reduces energy waste while maintaining performance. In sectors such as food process, manufacturing, pharmaceuticals, freight, and data centres, this level of control supports both effi ciency and operational integrity.


Conclusion


The future of retrofi t lies in making existing systems smarter. IoT-enabled AHUs off er a practical way to improve effi ciency, reduce costs, and enhance performance without major disruption. With open systems, simple connectivity, and long-life technology, IoT delivers clear advantages over traditional approaches.


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