Building Control Solutions You Can Trust
With over 45 years of experience in building control systems, R H Williams Ltd provides specialist engineering support for BMS platforms, HVAC plant control and integrated building systems across commercial buildings. We help facilities teams maintain reliable plant operation, reduce nuisance alarms and improve day-to-day system usability. Our work ranges from routine BMS support and HVAC controls maintenance through to control system stabilisation, fault diagnosis, alarm rationalisation and targeted control system improvements.
What you can expect
Commercial Building Control Systems
Simple, friendly support for the systems that keep your building comfortable, safe and efficient.
Install & Commission
New installs, refurbishments and tidy handovers — explained in plain English.
Maintain & Service
Preventative maintenance to keep everything reliable and reduce call-outs.
Remote support
Fast diagnosis and help when you need it — often without a site visit.
Specialist support
Explore our focused service areas.
BMS support • HVAC controls maintenance • Control system stabilisation • Control system recovery example
Current Engineering Focus
Steady, practical improvements across leisure, healthcare and PLC-based control projects.
Recent work has included supporting several leisure centre sites where building control systems had been poorly installed or had become unstable over time. Working with site teams, existing strategies were reviewed, control logic tidied and HVAC plant operation stabilised.
This work has reduced nuisance alarms, improved operator visibility and restored reliable plant control. In many cases relatively small adjustments to control strategies have made a significant difference to day-to-day system operation.
Alongside our BMS support work we have also been involved in Mitsubishi PLC based control systems, adapting existing strategies to newer program structures and features. This has included reviewing and rebuilding control logic to improve reliability and long-term maintainability.
Other recent projects have included dental healthcare facilities where plant and control systems were not fully understood by site operators. By upgrading the controls and providing secure online visibility, the systems can now be monitored and managed more effectively, allowing plant performance and control behaviour to be properly understood and optimised.
These projects reflect our continued focus on practical engineering support, helping facilities teams maintain stable building systems and reliable plant operation.
These projects sit alongside broader experience in legacy BMS support, controls integration and Mitsubishi PLC based plant strategies.
Read more about control system stabilisation and strategy optimisation or view our leisure centre recovery project example.
Recent Project Example – Leisure Centre System Stabilisation
Control system stabilisation and operational improvement
A local leisure centre was operating with control services running continuously, limited user-friendly graphics, and little visibility of system performance. The site was experiencing over 500 active alarms, making day-to-day operation difficult and masking genuine issues.
By spending time on site with the client, we established a clearer understanding of how the building was being used and the challenges faced by the operations team. We then reworked the control strategy, improved system logic, and introduced a more user-friendly approach to graphics and displays.
- Alarm count reduced from over 500 to zero
- Control strategies corrected and stabilised
- Systems now operate smoothly and predictably
- Regular system backups implemented for resilience and recovery
Following initial stabilisation work, ongoing optimisation continues to improve operator visibility and day-to-day system usability.
How we work
- Understand the site — We take time to understand your building, existing systems, and operational priorities.
- Provide clear, practical advice — Options explained in plain language, focused on what suits the site.
- Support long‑term performance — Ongoing support, proactive monitoring, and optimisation.
HVAC Control Systems & Maintenance
We work proactively with your sites to eliminate downtime, keep occupants comfortable and protect your budget. If something doesn’t need doing, We’ll tell you.
Building Management System (BMS) Support
Small control improvements can make a big difference. We help tune strategies, schedules and setpoints so you save energy without sacrificing comfort.
Reliable UK-Wide Building Control Services
Tell us what you’re working with, and We’ll recommend the best path forward.
Need support now?
Send a quick message — include your site name and what’s happening.