--- title: "BMS Case Studies: Gray's Inn Road & IQ5 Panel Upgrade" description: "BMS case studies from BIAV Controls: a full controls optimisation at 70 Gray's Inn Road, London, and a main plant Trend IQ3 to IQ5 control panel upgrade." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "@id": "https://biav-controls.co.uk/#organization", "name": "BIAV Controls Limited", "alternateName": "BIAV Controls", "url": "https://biav-controls.co.uk/", "logo": "https://biav-controls.co.uk/favicon-192.png", "image": "https://biav-controls.co.uk/favicon-192.png", "telephone": "07782 247022", "email": "accounts@biav-controls.co.uk", "address": { "@type": "PostalAddress", "streetAddress": "52 Selah Drive", "addressLocality": "Swanley", "addressRegion": "Sevenoaks", "postalCode": "BR8 7WD", "addressCountry": "GB" }, "sameAs": [ "https://www.instagram.com/biav_controls", "https://www.linkedin.com/in/bradley-thomas-62a0901b6/", "https://share.google/s8v7xuBhziXutqTyI" ], "founder": { "@type": "Person", "name": "Bradley Thomas" }, "identifier": { "@type": "PropertyValue", "propertyID": "Companies House", "value": "16344714" } }, { "@context": "https://schema.org", "@type": "WebSite", "@id": "https://biav-controls.co.uk/#website", "url": "https://biav-controls.co.uk/", "name": "BIAV Controls", "alternateName": "BIAV Controls Limited", "description": "London BMS specialists: Building Management System installation, service, panels and 24/7 call-out.", "inLanguage": "en-GB", "publisher": { "@id": "https://biav-controls.co.uk/#organization" }, "potentialAction": { "@type": "SearchAction", "target": "https://biav-controls.co.uk/?q={search_term_string}", "query-input": "required name=search_term_string" } } ] --- 52 Selah Drive, Swanley, BR8 7WD 24/7 phones answered · 2hr SLA response [accounts@biav-controls.co.uk](mailto:accounts@biav-controls.co.uk)[](https://www.instagram.com/biav_controls)[](https://www.linkedin.com/in/bradley-thomas-62a0901b6/) [![BIAV Controls](/__l5e/assets-v1/aa32365b-edd5-4700-8950-51fcbb3a024c/biav-logo.webp)](/) Services Service Areas [About](/about) Our Work [Contact](/contact) [07782 247022](tel:+447782247022)[Request a Quote](/contact) Case studies # Real BMS upgrades, measured in uptime and energy. Detailed write-ups of recent optimisation and controls upgrade projects delivered across London and the South East. Case study 01 ## 70 Gray’s Inn Road, London London Scope Full BMS optimisation Floors Multi-tenant + main plant Displays 15" tenant touchscreens Outcome Reduced energy use BIAV Controls successfully completed a full BMS optimisation and controls upgrade at 70 Gray’s Inn Road, delivering improvements across multiple floors and the main plant. The project included fault finding, controller replacements, network remediation, software modifications, commissioning, and the installation of tenant touchscreen displays fully integrated with the Building Management System. Our engineers identified and resolved a number of long-standing issues, including BACnet communication faults, controller instability, network wiring defects, failed field devices, and inefficient control strategies. We also carried out comprehensive optimisation of the heating and cooling systems, introducing demand-led control, outside air temperature lockouts, plant sequencing, and improved scheduling to significantly reduce unnecessary energy consumption while maintaining occupant comfort. The completed works have provided the client with a more reliable, energy-efficient BMS, improved visibility of plant operation, and enhanced tenant control throughout the building. BACnet communication faults resolved Network wiring defects remediated Demand-led heating & cooling control OAT lockouts and plant sequencing Case study 02 ## Main plant BMS control panel upgrade London BIAV Controls successfully completed the upgrade of a critical main plant Building Management System, replacing obsolete Trend IQ3 controllers with the latest Trend IQ5 controllers. The existing control system had reached the end of its operational life, making ongoing maintenance and future support increasingly challenging. Our engineers delivered a complete controls upgrade, providing the client with a modern, reliable and fully supported BMS platform. ### Scope of works 1. 01 Replacement of obsolete Trend IQ3 controllers with Trend IQ5 controllers 2. 02 Migration of existing control strategies 3. 03 Installation and commissioning of new I/O modules 4. 04 Full point-to-point testing of all field devices 5. 05 Functional testing of heating, cooling and ventilation plant 6. 06 Validation of alarms, schedules and plant sequencing 7. 07 Software optimisation and commissioning 8. 08 Final testing and client handover ### Results Improved reliability A resilient, fully supported platform with manufacturer backing. Faster performance Quicker processing and more responsive plant control. Enhanced cybersecurity Current-generation firmware and network hardening. Lower maintenance Fewer interventions and long-term supportability. The upgrade also delivered greater flexibility for future expansion and long-term supportability. The project was carefully planned and executed to minimise disruption, ensuring the building remained operational throughout. Before & after ## Trend IQ3 to IQ5, side by side. Drag the handle to see the transformation from the original Trend IQ3 control panel to the latest Trend IQ5 platform — a cleaner, more powerful and future-proof Building Management System, with full control of the building’s critical main plant retained throughout. ![Upgraded Trend IQ5 BMS control panel with new controllers and I/O modules after the main plant controls upgrade](/__l5e/assets-v1/26c5006e-6b83-40ba-a349-286328a8b51f/panel-iq5-after.jpeg) ![Original Trend IQ3 Xcite BMS control panel with legacy controller modules and dense field wiring before upgrade](/__l5e/assets-v1/ad30a604-9137-44aa-b781-93e2e2a7267d/panel-iq3-before.jpeg) Before: IQ3 After: IQ5 Drag the slider to compare the panel before and after the upgrade. ## Planning a controls upgrade? Free site survey and a clear, staged proposal — no disruption to occupied floors. [Request a quote](/contact) [07782 247022](tel:+447782247022) ![BIAV Controls](/__l5e/assets-v1/aa32365b-edd5-4700-8950-51fcbb3a024c/biav-logo.webp) Family-run BMS specialist delivering smart, energy-efficient solutions to support net zero buildings across London and the South East. Bespoke design, BS EN 61439 panels, open-protocol systems. [07782 247022 ](tel:+447782247022)[accounts@biav-controls.co.uk](mailto:accounts@biav-controls.co.uk) 52 Selah Drive Swanley, Sevenoaks BR8 7WD [](https://www.instagram.com/biav_controls)[](https://www.linkedin.com/in/bradley-thomas-62a0901b6/) Services - [BMS Service](/services/bms-service) - [BMS Installation](/services/bms-installation) - [BMS Call Out](/services/bms-call-out) - [BMS Pre-Design](/services/bms-pre-design) - [BMS Projects](/services/bms-projects) - [BMS Panel Manufacturing](/services/bms-panel-manufacturing) - [BMS Software & Graphics](/services/bms-software-graphics) - [BMS Electrical Installation](/services/bms-electrical-installation) - [BMS Maintenance](/services/bms-maintenance) - [BMS Energy Optimisation](/services/bms-energy-optimisation) Service Areas - [Swanley](/service-areas/swanley) - [Dartford](/service-areas/dartford) - [Sevenoaks](/service-areas/sevenoaks) - [Orpington](/service-areas/orpington) - [Sidcup](/service-areas/sidcup) - [Bexley](/service-areas/bexley) - [Bromley](/service-areas/bromley) - [Greenwich](/service-areas/greenwich) - [Croydon](/service-areas/croydon) - [Gravesend](/service-areas/gravesend) - [South East London](/service-areas/south-east-london) - [City of London](/service-areas/city-of-london) - [Canary Wharf](/service-areas/canary-wharf) Company - [About](/about) - [Our Work](/our-work) - [Case Studies](/case-studies) - [FAQs](/faq) - [Contact](/contact) - [Leave a review](https://search.google.com/local/writereview?placeid=ChIJDUK3gbWt2EcRTEnbDZS2st8) Hours: 24/7 Company No. 16344714 © 2026 BIAV Controls Limited. All rights reserved. [Privacy Policy](/privacy-policy)[Terms & Conditions](/terms-conditions)[Cookie Policy](/cookie-policy) £20M PL · £10M EL · £10M PI [Call now](tel:+447782247022)[Request a Quote](/contact) We use strictly necessary cookies to run this site, and optional cookies for live chat. See our [Cookie Policy](/cookie-policy). AcceptReject