WATER MANAGEMENT
Safe and efficient boiler water management
Wendy Liston, senior water treatment consultant for Deep Water Blue Ltd, explores the fundamentals of boiler water management and explains why effective treatment, monitoring, and operator competence are essential to the safe and efficient operation of healthcare steam systems.
Steam remains a critical utility across healthcare estates, supporting sterilisation, humidification, laundries, heating, and domestic hot water generation. Yet the performance, safety and efficiency of steam plant are closely linked to how boiler water is managed. Poor water quality can lead to scale formation, corrosion, and system instability, affecting both plant reliability and energy performance. Guidance such as BG01 – Guidance on the Safe
Operation of Steam Boilers and HSE’s Safe Management of Industrial Steam and Hot Water Boilers (INDG436) reinforces that safe boiler operation depends on effective supervision, competence, and monitoring. In healthcare environments, where resilience and compliance are non- negotiable, these principles are especially relevant.
Steam systems within the modern healthcare estate Steam is rarely visible within a hospital estate – yet it remains essential to its operation. Behind plantroom doors and beneath service corridors, steam boilers quietly support sterilisation, humidification, catering, laundries, heating, and domestic hot water generation. They underpin infection control, patient comfort, and the smooth running of clinical services. In many hospitals, steam networks distribute energy
across multiple buildings and departments, making steam plant a critical element of estate resilience. Interruptions to steam supply can affect sterilisation processes, environmental conditions within clinical spaces and the delivery of essential services. Because of this, reliability is often the primary focus when managing steam plant. As long as boilers continue to operate and energy costs remain within budget, systems are frequently considered to be performing adequately. However, one of the most influential factors affecting boiler safety, efficiency, and long-term reliability is often overlooked: boiler water management. Water chemistry determines how boilers operate internally. Poorly managed water can lead to scale formation, corrosion, and steam carryover – issues that gradually reduce efficiency, increase fuel consumption, and damage critical plant.
Healthcare estates teams often manage complex steam networks that have developed over many years. Boilers installed at different times may operate at different pressures and serve different parts of the estate, creating systems with varying operating characteristics and water treatment requirements. Within a hospital environment, even relatively minor operational issues can have wider consequences.
Interruptions to steam supply may affect sterilisation processes, environmental control within operating theatres, or domestic hot water production across wards. For estates teams responsible for maintaining reliable infrastructure, understanding the factors that influence boiler performance is therefore essential.
Steam and healthcare infrastructure resilience Healthcare estates teams often manage complex and evolving steam networks that support multiple buildings and clinical departments across a site. In this environment, maintaining reliable steam generation is not simply an engineering task – it forms part of the wider resilience of healthcare infrastructure. Ensuring boilers operate safely, efficiently and consistently is therefore a key responsibility for estates and
From the top: A dedicated boiler water treatment testing station equipped with test kits and monitoring charts; boiler operators taking part in onsite water treatment training to meet the requirements of the BG04.
April 2026 Health Estate Journal 43
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