Core services
Focused support for commercial building control and HVAC control systems.
Select a service below to view the dedicated page.
Services
We support heating, ventilation and air conditioning (HVAC) control systems across commercial buildings, providing installation, commissioning, planned maintenance, remote support, energy optimisation and system upgrades — all delivered with a consistent, professional approach.
Friendly, proactive support for building control systems — designed to reduce downtime, improve comfort and support energy savings.
Installation & commissioning
New installs, refurbishments and upgrades — delivered with tidy workmanship and a clear handover.
- Installation for new and existing commercial buildings
- Commissioning, verification and simple documentation
- Plain-English walkthroughs for your team
Planned maintenance & routine servicing
Prevent problems before they happen and keep your system running efficiently.
- Preventative checks to reduce breakdown risk
- System health reviews and “small fixes” that stop bigger failures
- Clear reports and recommendations (no upselling)
Remote monitoring & support
Fast diagnosis, proactive checks and clear updates — often without waiting for an on-site visit.
- Remote assistance for supported client systems
- Early warning on faults and performance drift
- Quicker recovery and less disruption
Energy optimisation
Tune control strategies, schedules and setpoints to reduce waste and support comfortable spaces.
- Seasonal tuning and schedule reviews
- Comfort vs cost balancing
- Practical recommendations you can act on
Upgrades & modernisation
Make older systems easier to use and more reliable — without unnecessary replacement.
- Modernisation planning and staged upgrades
- Replacing obsolete controllers where needed
- Improved usability and easier future maintenance
Systems & Platforms Experience
Long-standing experience across legacy and current building management systems, head-end platforms and PLC-based controls.
R H Williams Ltd has extensive experience working with a wide range of building management systems and control platforms developed over many years within the HVAC controls industry.
- Trend BMS platforms and head-end systems
- Schneider Electric / TAC systems including Vista and Menta
- Honeywell and CentraLine systems including Coach AX and Lynx
- Tridium Niagara 4 based systems and integrations
- EasyIO controllers and Sedona based platforms
- Mitsubishi PLC based control systems
Support is provided for both modern installations and legacy control systems still operating in commercial buildings.
Typical Engineering Work
Practical controls engineering based on what real sites actually need.
- BMS alarm reduction and rationalisation
- HVAC plant fault diagnosis
- Control strategy review and optimisation
- Recovery of unstable or poorly configured control systems
- Integration of plant systems including HVAC, energy meters and monitoring equipment
- Review and correction of control system installations
- Control panel design and documentation
- End-user training and system handover
Much of our work involves reviewing existing systems that are not performing as originally intended, then stabilising plant operation through improved control strategies and system configuration.
Typical Control System Issues
Common problems seen in buildings where controls have evolved over time, been poorly commissioned or are no longer well understood.
Many of the systems we are asked to review are operating in buildings where control strategies have changed over many years and may no longer reflect the intended plant operation.
- Excessive nuisance alarms making it difficult to identify genuine faults
- Poorly configured control strategies resulting in unstable plant operation
- Systems installed without proper commissioning or documentation
- Operators unable to understand plant behaviour due to limited system visibility
- Integration problems between HVAC plant and building management systems
- Legacy control systems still operating but poorly understood
A structured engineering review can often stabilise these systems, improve usability and restore confidence in the building controls.