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Key Commissions

The view from the front entrance of The Hold on Ipswich Watefront

The Hold, Suffolk County Archive (£17M New Build)

  • A joint partnership between Suffolk County Council and University of Suffolk this new cultural hub faces the Ipswich Waterfront.
  • The Archive 'holds' Suffolk's records and artefacts in two large temperature and humidity controlled archive store rooms.
  • Air flow is generated by desiccant wheel handling units to maintain target humidity levels and limit heating/cooling via Air Source Heat Pumps. 
  • Primary lighting is all low energy LED, with automatic controls.
  • Johns Slater and Haward advised and designed the M&E services.
  • image c/o R G Carter.


The entrance of the Paxman Academy  in Colchester

Paxman Academy, Colchester (£14M New Build)

  • A brand new  secondary school on the former site of the 1950's Alderman Blaxhill school.
  • Existing structure was demolished and replaced by a 4 storey, Teaching Block and single storey sports block/activity studio.
  • Johns Slater and Haward advised on feasibility stage, designed and specified the mechanical and electrical works and provided site monitoring of the installation work.
  • Modelling of the building was undertaken to promote thermal overheating analysis and climate based daylighting.
  • Hybrid ventilation systems and LED lighting and controls featured.


View from the cafe area of the climbing faciltiies.

Clip 'n Climb, Ipswich (£2M New Build)

  • This new build project was for international franchise, Clip ’n Climb’s centre in Ransome’s Europark, containing climbing and games facilities, as well as a Paddy & Scott’s café.  
  • Johns Slater and Haward advised at feasibility stage, designed and specified the mechanical and electrical works, and provided site monitoring for mechanical and electrical installation works on this complex, leisure installation building.  
  • The centre uses radiator heating from a gas fired boiler plant.
  • South facing photovoltaic panels boost the building's environmental credentials.


Engineering drawings by Johns Slater and Haward of the converted shipping container

ATICAS Block A Clinic Facility, East Africa, New Build

  • This interesting project  for Atlas Group, London was for a new build health clinic, formed from shipping containers in the UK, for Kenya. 
  • JSH designed the MEP services as a modular solution, allowing services to be manufactured in the UK and plugged together on site.
  • The health care unit was designed to be off-grid, powered by a hybrid generator, PV and battery storage solution to reduce fossil fuel dependency.
  • Water to the facility is via a borehole and containerised water processing/filtration plant. Hot water is generated by solar thermal backup/local immersion heaters.

Inside a colourful  kitchen and classroom area at Oak View

Oak View SEN School, Stand-Alone Extension (£2.8M New Build)

  • This new build provides specialist Autistic Spectrum Condition / Social, Emotional and Mental Health integrated teaching accommodation.
  • Facilities built include a therapy room, a calm room, and a sensory space, alongside standard classrooms.
  • There is convector radiator heating from a gas-fired boiler plant with a seasonal efficiency of 97%, and variable speed pumping on the water circuit with pressure sensors which are integral to the pump.
  • Photo courtesy of Kier Construction Eastern.

University of Essex BCI-NE Laboratory logo

University of Essex, Brain Computer Interface & Neural Engineering (BCI-NE) (£4.2M Laboratory Refurbishment)

  • The University's School of Computer Science & Electronic Engineering commissioned refurbishment works to create laboratory and ancillary space within the newly built Network Building.
  • The open plan multimedia room was subdivided into 4 experimental areas, one being shielded against EM interference.
  • Electroencephalography (EEG) and functional near-infrared spectroscopy installed.
  • The lab comprises 70m2 plus additional space for PhD students.
  • JSH designed, managed, tested and commissioned the M&E services installations including 3 x Faraday cages.

Inside the converted barn at Chillesford lodge, the swimming pool

Chillesford Lodge, Model Farm Development (£3M conversion)

  • This project involved the conversion of Grade 2 Listed barns, which are part of a Victorian model farm on an ancient English agricultural estate, into a residential development and swimming pool.
  • A swimming pool was installed in one of the barns.
  • Underfloor heating controlled by smartphone was included in the residential building.

The Dairy House, Ipswich High School (Renovation, £2.7m)

  • Redevelopment of Dairy House site comprising 2 x cottages, adjacent milk parlour and a sun room extension.
  • Existing house and former garage block attractively remodelled to provide sleeping accommodation for boarders.
  • Electricity supply upgraded and strategy for provision of space heating to the buildings designed and overseen by JSH.
  • Winner of BSA's Best Boarding House Extension/Refurbishment Award, May 2021.

Sheepen Road Offices, Colchester (Phase 1, £3M New Build)

  • Colchester Borough Council’s commercial project management arm, Colchester Amphora Trading Limited, commissioned a new build 3 storey office block.
  • This block houses leading local law firm Birkett Long. 
  • Rent generated for the council from the building goes towards providing front line council services.
  • High efficiency air source heat pumps and photovoltaic panels were installed, producing 43,211 kWh/yr.
  • Solar glazing was included on selected windows.

Inside the modular build, the nurses' station

James Paget University Hospital, Majors/ED Modular Redevelopment (£5M)

  • This project had a very tight timeframe. 
  • Originally estimated at 40 weeks it was delivered in under 3 months, over five phases. The modular building approach facilitated this.
  • Ground floor Majors unit was altered to create 10 x bays.
  • Asbestos removal, replacement of the Resus floor finishes and ward decanting costs were all key factors for consideration in the project.
  • image c/o Eco Modular Buildings.

Inside the hangar showing a helicopter at dusk

Essex and Herts Air Ambulance, New Aircraft Hangar, Essex (£4.5M)

  • The EHAAT charity commissioned the new hangar in North Weald via a Government grant to improve existing facilities.
  • ASHP heating provides LTHW radiant heating to the hangar.
  • Mechanical ventilation provided via local concealed ducted heat recovery units.
  • Helicopter apron heating keeps the surface ice-free in all weather.
  • This sizeable building achieved an EPC rating of A.

View inside and through windows of penthouse

Stratford Edge, New Residential Block (£32M New Build)

  • The project comprised the construction of a new build residential block adjacent to the Queen Elizabeth Olympic Park in London.
  • During construction this project was the largest single building utilising 'Daikin Aitherman' communal heat pump systems.
  • Apartments to the high rise 'core' are fully sprinklered.

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