Comprehensive MEP upgrades and validations across New Street Square, delivering robust lifecycle performance, occupant comfort and a revitalised public realm.
Find Out MoreClient: Landsec
We have been involved in a variety of MEP projects across Landsec’s New Street Square Estate. From basement wellness facilities in Building 6 through to high-rise office refurbishments on Levels 1–17, our team delivered end-to-end MEP design, supply, installation, commissioning and performance validation. Works have included new shower and changing rooms, Cat A and Cat B office upgrades, public-realm lighting and irrigation schemes, sprinkler-room reconfigurations, air-conditioning replacements, hydraulic testing and booster-set installations. Every project has been coordinated with structural and architectural requirements, complied with current regulations and was optimised for reliability, energy efficiency and a minimum 10 to 15-year lifecycle.
Recent New Street Square projects:
6 NSS New Basement Shower Facility
We produced a full MEP performance specification for new male and female changing rooms and showers in the basement of Building 6, covering design, supply, installation, and commissioning of mechanical ventilation, hot and cold water services, sanitary fittings, drainage, electrical lighting, power distribution, and controls. All works were coordinated with existing structural and architectural finishes to ensure ease of maintenance and compliance with regulations, supporting a robust 10-year lifecycle.
Floor 9 Refurbishment & Enhancement (Building 6)
We delivered a Cat A MEP refurbishment on Level 9 and common parts Levels 1–17 to achieve 15 years of continuous operation at an occupancy density of 1:8. Works included replacement or modernisation of all fan coil units with water-side controls, installation of LTHW plate heat exchangers for hydraulic separation, VAV primary-air delivery, new low-energy LED lighting with Simmtronic DALI controls, and additional CT energy metering. We upgraded the Schneider BMS outstations, replaced all DBs/MCBs with surge arrestors, overhauled fire alarms and voice evacuation speakers, provided DALI self-test emergency lighting, and modified ceilings and perimeter details with specialist swirl grilles to resolve heating-zone issues while preserving split-tenancy and mixed-mode ventilation flexibility.
New Street Square Public Realm
A Stage 3 MEP design report defined landlord requirements for lighting, power, irrigation, and drainage to revitalise New Street Square’s public realm. We specified feature planters, trees, bench seating, and decorative lighting schemes to enhance the daytime environment and create nighttime focal points. External landlord-controlled power outlets were integrated to support special events, while drainage and irrigation layouts ensure sustainable planting with all services concealed yet readily accessible for maintenance.
6 NSS Level 9 Validation
Our validation team investigated low flow in the Level 9 LTHW loop and chemically descaled the 350 kW plate heat exchanger using 1–3 % inhibited hydrochloric acid. After neutralising effluent with sodium hydroxide, we cleaned strainers, flushed the PHE with fresh water, dosed with corrosion inhibitor, and reintegrated it. Post-works, we measured main branch flow rates, pressure drops, and secondary pump performance to confirm restored hydraulics and meet the client’s operational criteria.
Cat B & Cat A Office Refurbishment (Levels 1–7)
We executed a dual-standard refurbishment: Cat B fit-out for Levels 1–3 “Create” spaces and Cat A upgrades for Levels 4–7, all targeted at 1:8 occupancy. Scope included replacement of all FCUs with water-side controls, installation of three CHW heat interface units and single LTHW HIUs, VAV primary-air systems, upgraded Simmtronic DALI lighting controls, CT energy meters for separate lighting/fan coil and general power circuits, Schneider BMS overhaul, MCBs with surge arrestors, fire alarms and voice evacuation speakers, DALI self-test emergency lighting, ceiling replacements with specialist swirl grilles, and modularised service routes to preserve tenancy flexibility.
3 NSS Sprinkler Separation
At 3 New Street Square, we performed sprinkler tank-room enabling works, removing raised floors and concrete bases, reinstating wall and floor penetrations, installing new pump bases, and rerouting BCW pipework. Modifications to electrical trays, lighting, drainage, and adjacent ductwork were coordinated with structural and architectural teams to ensure full sprinkler separation and compliance.
4 NSS Management Suite AC Replacement
We replaced the Daikin VRV system in the Management Suite (4 NSS), decommissioning existing VRV fan coils, BS boxes, controls, and outdoor unit. A new heat-recovery outdoor unit was installed to serve ten fan coil units and BS boxes, with secondary ductwork revisions and steelwork removals to facilitate installation. The system was tested and commissioned to enhance energy efficiency and occupant comfort.
4–5 NSS Pressurisation Unit Replacement
Across Levels 4–5, we replaced existing Reflex pressurisation units during normal working hours. Circuits were isolated hydraulically and electrically, old units removed, new units installed, and each system tested and commissioned to ensure correct pressure maintenance and compliance with current standards.
6 NSS Level 12 Chilled Water Validation
We carried out hydraulic performance tests on the landlord’s secondary plate heat exchanger at Level 12 following a new control valve installation. Flow rates and pressure drops were measured, and a detailed report with optimization recommendations was provided to the client.
5–6 NSS Cold Water Booster & Pressurisation
In Building 6’s chiller room, we replaced PU16 vessels and installed a new domestic cold-water booster set complete with inverter drive and control panel. A Lowara pump coupled with a Hydrovar drive was supplied, installed, and commissioned to deliver reliable pressure boosting and seamless system control.
5 NSS Level 7 Plate Heat Exchangers
Our BMS team installed new differential-pressure switches and flushed the secondary CHW circuits feeding two HIUs on Level 7. Two CHW samples were taken for laboratory analysis to assess water quality and ensure the long-term integrity and performance of the heat interface units.
5 NSS HIU Modifications
On the Taylor Wessing floors, we refurbished the HIUs by replacing pump sets, modifying pipework, upgrading BMS hardware and software, swapping expansion vessels, flushing and chemically cleaning local pipework and plate heat exchangers, and repairing thermal insulation to restore full system efficiency.
5 NSS Level 11 FCU Remedials
We identified and remedied 28 fan coil units on Level 11—replacing fan decks, sourcing missing internal components, and resolving power issues—to bring all 25 originally flagged units back into full operation, ensuring reliable climate control for occupants.
Project DetailsWe produced a full MEP performance specification for new male and female showers in Building 6’s basement—including ventilation, hot/cold water, sanitary fittings, drainage, lighting, power and controls—coordinated to the existing structure and finishes and designed for a 10-year maintenance cycle.
On Level 9 and common parts of Building 6, we executed a Cat A MEP refurbishment to support 15 years of continuous operation at 1:8 occupancy. Key works included modern water-side controls on all fan coil units, VAV primary-air delivery, LTHW plate heat exchangers, low-energy DALI-controlled LED lighting, upgraded BMS outstations, energy metering, fire-alarm and evacuation speaker overhauls, and specialist swirl-grille ceiling installations.
Our Stage 3 design defined landlord requirements for lighting, power, irrigation and drainage across New Street Square’s external spaces. We specified feature planters, bench seating and decorative lighting to enhance daytime use and create nighttime focal points, while integrating concealed service outlets for events and sustainable irrigation and drainage layouts.
We investigated and resolved low-flow issues on Level 9’s LTHW loop by chemical descaling of a 350 kW plate heat exchanger, neutralising effluent, flushing and inhibitor dosing. Post-works testing of flow rates, pressure drops and pump performance confirmed restored hydraulics and validated system performance against stringent operational criteria.
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