NSI UK & Ireland

We design, build, and operate water treatment plants to produce safe, potable drinking water that meets the most stringent quality standards. For industries requiring high-quality process water (such as manufacturing, pharmaceutical, and food processing), we offer tailored solutions. Our expertise includes industry-leading technologies for filtration, purification, softening, and disinfection, ensuring improved water quality and enhanced operational efficiency

NSI Commercial Buildings Solutions are a broad-spectrum water treatment and building services provider.

Offering a total solutions approach to a wide range of clients’ commercial buildings, NSI CBS deal with a vast array of projects as diverse as data centres, industrial sites, schools, universities, and heritage sites.

Our extensive capabilities include:

Boilers & Cooling Towers:
Chemical treatment, service, and compliance with complete treatment systems, including dosing, control, automation and pretreatment. Process water equipment (for example RO and Softeners), sales & service and installation.

Legionella Control:
A founding member of the Legionella Control Association with a dedicated nationwide team delivering comprehensive water and air (full HVAC) hygiene and compliance, we deliver a wide range of services including risk assessments. With expertise on call 24/7 and UKAS water testing, we are a partner that can be trusted to keep your building compliant.

i-Maintenance:
Our i-Maintenance division offers innovative energy building management and encompasses many aspects of building maintenance and compliance.

Water Hygiene Services:
Water systems tested and cleaned to meet your legal obligations with detailed documentation of works, system status and any advisories.
Repairs and installation of new storage tanks and equipment carried out in a timely and cost-effective manner.

Water Treatment Services:
We provide comprehensive water treatment services across the UK. All work is carried out in accordance with current legislation and following guidelines from relevant regulatory and advisory bodies.

Boiler Water Treatment | Closed System Water Treatment | Cooling Water Treatment | Effluent Water Treatment | Water Pre-Treatment

Air Quality Services:
We provide Air Quality Services across the United Kingdom. All work is carried out in accordance with current legislation and following guidelines from relevant regulatory and advisory bodies. View details of our specific air quality provisions:

Air Quality Monitoring | Ventilation System Services | Kitchen Extract System Management & Cleaning | Local Exhaust Ventilation (LEV) Services

Booster Sets & Pressurisation Vessels:
Reliable, high-efficiency equipment that is custom-designed to cause minimal disruption to the existing services at the time of installation and commissioning.

Shower & Tap Systems:
We provide a wide range of high-efficiency shower room/bathroom solutions for clients that demand quality products with minimal maintenance and low water consumption. Our specially constructed fixtures, coupled with expert compliance-focused system design, ensuring customer satisfaction, safe water distribution and long term reliability.

Specialist Coating Service:
Fully refurbished and relined water storage tanks and cooling towers with documentation, photographs and specification of works. Full ACoP L8 Compliance.

Energy Management Services:
We provide Energy/Utilities management and reporting, complete with solutions for consumption / financial savings and calculated paybacks. A monthly energy report would be produced representing the consumption of Water, Gas and Electricity.

Legionella Training Services:
We offer an extensive range of legionella training courses, seminars, and practical skills-based workshops that have been specifically developed to meet the needs of candidates at all levels of technical competence and experience.