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Commercial refurbishmentCompleted

Curtain House Shoreditch

Curtain House, London
Project overview / 01

Modern engineering within a historic building.

Curtain House, 134-146 Curtain Road, is a listed Victorian building in Shoreditch being transformed for contemporary commercial use. Introducing new mechanical and public health systems required careful consideration of the existing structure, service routes and architectural fabric.

Working under Mala Engineering on the RED Construction refurbishment, MPH delivered water-side Mitsubishi City Multi HVRF pipework together with cast-iron rainwater and foul drainage, plantroom water connections, sanitary installations and a challenging rainwater harvesting system.

Location
Shoreditch, London
Sector
Commercial refurbishment
Status
Completed
Principal Contractor
RED Construction
MEP Contractor
Mala Engineering
Client
Aviva Investors
Building
Grade II listed warehouse
MPH role
Mechanical & Public Health Installations
Installation summary

Project at a glance

II
Listed building refurbishment
15–54
mm · Copper press-fit range
02
Rainwater drainage routes
03
Water storage / booster arrangements

City Multi HVRF • Ensign cast-iron rainwater drainage • WC / washdown / irrigation water reuse • Basement water services

The engineering / 02

Complex services. Considered installation.

01 / HVRF distribution

Mitsubishi City Multi HVRF water-side installation.

MPH installed multi-level copper distribution connecting Valve Branch Controllers (VBCs), Sub-Hybrid Branch Controllers (Sub-HBCs) and terminal fan coil units. The press-fit system ranged from 15 mm to 54 mm and required precise jointing, support positioning and access for pressing equipment.

As the design developed, enlarged pipe sizes affected routing and support arrangements. MPH adapted installations in coordination with the mechanical contractor, protecting connections and working clearances within the restricted ceiling and service zones.

02 / Gravity Drainage

Cast-iron rainwater, soil and vent systems.

MPH installed above-ground rainwater and foul drainage infrastructure through the refurbishment, including Ensign cast-iron rainwater pipework with mechanically coupled fittings. The public health design included cast-iron soil stacks, venting and specified waste branches connecting the sanitary installations.

The systems required suitable falls, stack supports, maintenance access and careful coordination with structure and other retained services. Rainwater and foul drainage were kept separate, as required by the design specification.

03 / Water Reuse

A challenging rainwater harvesting installation.

A major feature of MPH’s package was the successful installation of a dedicated rainwater harvesting system. The specified arrangement conveys runoff from the main roof to basement storage and a packaged Aquality filtration and pumping system, with UV disinfection on the recycled-water booster discharge.

Harvested rainwater is designed to serve WC cisterns, washdown points and irrigation, supported by mains-water top-up when required. The rear roof, terrace areas and part of the main roof drain separately to existing ground-floor connections. Integrating these distinct routes, plant and reuse distribution within the historic building required careful installation coordination.

04 / Basement Plantroom

Water storage and booster connections.

MPH connected the incoming mains water supply to the building’s cold water storage tank and associated potable water booster infrastructure, and to the separate Category 5 tank and booster set serving mechanical HVRF water requirements.

The specified water services strategy also incorporates treatment, filtration and rainwater harvesting plant. Pipework layout, isolation points and equipment interfaces had to be coordinated within the available plantroom space while preserving safe access for maintenance.

05 / Delivery & Coordination

Working within a listed building.

The existing building imposed practical limits on routes, supports and installation sequencing. MPH developed buildable solutions through site review, mock-ups and detailed coordination with Mala Engineering and adjacent trades, responding to design updates as the fit-out progressed.

Together, the HVRF distribution, cast-iron drainage, rainwater reuse and basement water-services work demonstrate MPH’s ability to deliver technically diverse mechanical and public health packages within a constrained refurbishment setting.

Technical feature

One roof resource. Two drainage paths.

The Stage 4 design distinguishes harvested main-roof runoff from rainwater discharged directly to the existing drainage network.

PATH 01 / RECOVER & REUSE

  1. Main roof — rainwater collection
  2. Basement — Aquality storage, filtration & pumping
  3. Distribution — UV disinfection at booster discharge
  • WC cisterns
  • Washdown
  • Irrigation

PATH 02 / DIRECT DRAINAGE

  1. Rear roof, terraces & part of main roof — separate runoff
  2. Existing connections — ground-floor drain points

Mains-water top-up is specified for the harvesting arrangement.

MPH’s contribution / 03

Our scope of works.

  • Mitsubishi City Multi HVRF water-side distribution
  • VBC and Sub-HBC pipework connections
  • FCU branches and terminal connections
  • Press-fit copper pipework, 15–54 mm
  • Multi-level copper distribution and supports
  • Ensign cast-iron rainwater pipework
  • Above-ground soil, waste and vent installations
  • Rainwater harvesting for WCs, washdown and irrigation
  • Basement rainwater harvesting plant connections
  • Incoming mains water supply connections
  • Potable cold water storage and booster connections
  • Category 5 tank and booster set connections
  • Sanitaryware installation and final connections
  • Installation adaptations to design revisions
  • Mock-ups, detail and multi-trade coordination
  • Hot & cold water distribution
  • Plantroom pipework & equipment connections
  • BIM Coordination
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