More
Discover how LNT Construction standardised Sentinel KalGuard® across all new sites to eliminate limescale risk, reduce maintenance costs, and safeguard resident wellbeing.
Speak to the Sentinel Commercial team
Hard water is not just a nuisance - it’s a material risk to building performance, asset longevity, and occupant safety in care homes and other healthcare facilities. Around 65% of the UK is supplied with hard water, and in these areas water hardness typically exceeds 200 ppm, the threshold where preventative treatment is recommended under UK Building Regulations Part L for the control of limescale formation.
In buildings that operate 24/7, such as care homes, hospitals, and clinics and other healthcare buildings, hard water can cause a number of problems such as:
Given these risks, forward-thinking specifiers and asset owners increasingly recognise that proactive water treatment is an operational priority, not an optional extra in healthcare buildings.
LNT Construction is a leading UK developer of purpose-built care homes, designing and delivering modern, energy-efficient environments for major care operators.
With a three-year post-build maintenance responsibility on every project, LNT must ensure that all mechanical and plumbing systems perform reliably long after handover. Protecting these systems from hard water damage is a mission-critical priority.
Sentinel recommended KalGuard®, a whole-building electronic limescale control system designed specifically for commercial environments.
LNT now specifies KalGuard® as a standard installation across every new care home.
To ensure long-term reliability, Sentinel provides:
LNT Construction’s decision to adopt KalGuard® across every new care home build is rooted in delivering predictability, efficiency, and longevity across its portfolio. Rather than addressing hard water issues reactively after costly breakdowns occur, LNT standardises KalGuard to:
KalGuard permanently conditions incoming mains water to prevent scale formation throughout the hot and cold water system, helping boilers, heat exchangers, hot water cylinders, and ancillary plant operate efficiently over the long term.
Unlike salt-based water softeners, KalGuard operates without regeneration, salt, or wastewater, which eliminates routine consumable costs and water waste altogether. With no ongoing salt requirements and minimal maintenance, many specifications achieve a return on investment within 12 months when compared to traditional softening solutions.
KalGuard’s electrolytic technology, delivering a low and stable level of zinc into the water to alter calcium carbonate crystal formation, is one of the few powered water treatments recommended by the UK Building Services Compliance Guide to Part L.
KalGuard requires minimal intervention over its long service life (zinc anode units typically last up to 10–12 years). An established service plan, such as Sentinel’s annual maintenance, further frees estates teams to focus on core clinical and resident outcomes rather than repetitive water-system issues.
Since implementation at LNT sites, KalGuard has delivered:
By preventing scale-related faults, fewer call-outs, part replacements, and unplanned shutdowns are required, freeing maintenance budgets for other building priorities.
Consistent hot water delivery and dependable plumbing performance are essential in care environments where downtime impacts resident wellbeing and staff workflows.
Scale reduction reduces crevices where bacteria can cling, supporting overall water safety and infection control plans, an increasingly important discussion point for CQC assessments and NHS-linked guidance.
Asset owners benefit from a consistent specification across multiple regions and projects, removing ambiguity from design and tender stages and enabling predictable lifecycle planning.
LNT Construction will continue installing KalGuard® across all future projects. Supported by Sentinel’s hands-on technical expertise, both organisations expect the partnership to grow as LNT expands its nationwide build programme.
“The KalGuard gives us the peace of mind that our buildings are protected long term from the issues brought about by hard water. The Sentinel Commercial team have always made themselves available to support LNT and that is part of the reason why we wouldn’t use any other product—as service is paramount.”
Sean Hague, Plumbing and Heating Supervisor,
LNT Construction
Reduce risk. Improve reliability. Protect your assets long term.
Explore how KalGuard® can safeguard your commercial or residential developments.
