The external heat rejection unit size is typically based on the required heat rejection capacity and approach temperature (external air inlet temperature vs CHW/air outlet temperature).
We also realised that the sort of P-DfMA systems we were designing for the MOJ could then be transferred across to other government infrastructure projects, thereby facilitating the wider adoption of these beneficial, lean construction processes.. Bryden Wood published the first book on platform design in 2017 (.new updated edition of Platforms book available to download here. )

and we have continued to expand on and optimise Platforms and other MMC methodologies in our work with both public and private sector clients.We’ve never sought to patent our work and we have open sourced the code for both of our construction design apps - SEISMIC and PRISM.Our goal is to bring about maximum benefit for the wider industry and society.

We encourage our clients to join us on this journey by allowing others to benefit from the knowledge and systems we create for each project.This creates a kind of reinforcing circle across the public and private sectors.

By working together, we believe the industry can apply these transformative, design to value processes at scale and thereby deliver enormous benefit for the world..
In fact, we’re already seeing a wide range of benefits from the adoption of Platforms (P-DfMA) and our wider approach using modern methods of construction.Every project starts with a brief, of course.
A clear brief allows for the design to be checked continuously as it evolves.Our approach to developing a brief is to place it firmly in the context of being a part of the process which ends with a fully functioning hospital.
The brief cannot – or should not – exist in splendid isolation.It must take into account the massing of the hospital, the plant and M&E requirements, servicing facilities, the extent and location of the car parks.
(Editor: High-End Steamer)