Commercial BMS and Building Automation in Central London

A building-management system, sometimes called a BMS, BAS or building automation system, is the central control system for a building's engineering services. It monitors and controls heating, cooling and ventilation, and often lighting, metering and other plant, from one interface. In practice it does three jobs: it holds the building comfortable automatically, it runs plant only when the building actually needs it, and it shows the facilities team what the building is really doing, temperatures, run hours, energy use and faults, so problems are corrected from evidence rather than guesswork.

Often the existing system can be improved substantially. Many buildings suffer from drifted commissioning, plant held in override and time schedules nobody remembers setting, problems that a controls review, re-commissioning and sensible reprogramming can address without new hardware. Where hardware is genuinely obsolete or unsupported, replacement can usually be phased, a new head-end and graphics first, then controllers panel by panel, so cost and disruption are spread. We review what exists before recommending anything, and we are candid when modernisation is not worth pursuing.

Not for existing buildings. The EU requires larger non-residential buildings to be fitted with building automation by set deadlines, but that requirement does not apply in Great Britain. What England's Part L guidance (Approved Document L, Volume 2) does say is that a new non-domestic building with heating or air conditioning over 180kW should be provided with a building automation and control system, and that a system installed or replaced in an existing building of that size should meet the same standard. For most buildings the driver is therefore commercial, energy cost, comfort and credible reporting data, rather than a statutory mandate.

A well-designed, well-commissioned BMS gives a building the best conditions for reducing energy waste: plant runs to genuine occupancy, heating and cooling stop fighting each other, and metering makes consumption visible so drift is caught early. What we will not do is promise a percentage saving, results depend on the building, how it is occupied, energy prices and how the system is operated after handover. What we can say is that scheduling, control tuning and monitoring address the most common sources of avoidable waste we encounter in commercial buildings, and that trend data lets you verify the effect for yourself.

It can support all three in different ways. Improved controls are among the measures that can contribute to a building's energy performance, which matters wherever minimum standards apply to lettings. ESOS audits and SECR reports both depend on credible energy data, sub-metering, consumption profiles and trend logs from a BMS make audits faster and reported figures more defensible. None of this happens automatically: the system has to be specified so the right data is captured and retained, and we design for that from the outset. Your specific compliance obligations should always be confirmed with your professional advisers.

Yes, where the project calls for it. Lighting and automated shading can share occupancy and scheduling information with the HVAC controls so the whole floor responds to the same reality. Metering, leak detection, water services and plant status can be brought into one view. Life-safety systems such as fire alarms remain independent, as they must, the BMS monitors their status rather than controlling them. We design interfaces around open protocols wherever practical, so the building is not tied to a single supplier for its lifetime.

Usually, yes, with planning. Controls modernisation lends itself to phased delivery: panels changed over one at a time, switchovers scheduled out of hours, temporary control arrangements holding comfort while sections migrate, and clear communication with tenants throughout. The sequencing belongs in the specification, not left to chance on site, and it is one of the things we design explicitly. The enquiry form on this page asks whether the building will remain occupied during the works for exactly this reason.

Commissioning proves the system does what the design says: point-to-point checks that every sensor, valve and actuator is connected and reading correctly, testing of control sequences under real conditions, and witnessed demonstrations before handover. Seasonal tuning recognises that a building commissioned in winter has never met summer: settings, schedules and compensation curves are revisited across the seasons and adjusted against how the building actually behaves. Where the appointment includes it, we witness commissioning on the client's behalf and return for tuning visits; it is where designed performance becomes actual performance.

Where included in the appointment, yes. Secure remote access lets faults be diagnosed, schedules adjusted and performance reviewed without waiting for a site visit, and alerts can be routed to the right people rather than an unwatched inbox. We design remote access with IT and security requirements in mind, appropriate network separation, named user accounts and an agreed record of who can change what, because a building control system deserves the same care as any other connected business system.

Yes, and we would argue the system is not finished until they can. Where the appointment includes it, handover covers structured training for the facilities or estates team, plain-English descriptions of how each system operates, points schedules and record documentation, and simple guidance for everyday users, so adjusting a meeting-room setpoint or extending hours for an event does not require a service call. Clear controls that people actually understand are one of the most reliable energy measures a building can have.

AVC is a design-led consultancy that also delivers and commissions systems on selected projects. Many clients appoint us for design, specification and review only, with installation tendered to specialist controls contractors; we then review quotations so they are genuinely comparable, answer technical queries and witness commissioning. Where delivery is included, it is agreed explicitly in the scope of the appointment, so responsibilities are never ambiguous.

Whatever exists: drawings, O&M manuals, points lists, EPC certificates, energy bills or half-hourly data, photographs of plant rooms and control panels, or simply a description of the symptoms, rooms that never feel right, plant running at odd hours, energy costs that climbed without explanation. Early-stage enquiries without complete information are welcome; part of our role is helping define the brief. The enquiry form on this page accepts secure uploads of PDF, DWG, RVT, IFC and common document formats.