﻿SAS helps the Police Federation’s commitment to sustainability
As part of the design brief for using energy-efficient technologies, SAS International has supplied passive and active integrated service modules for the headquarters of the Police Federation of England & Wales in Leatherhead.
The M&E services for this 2-storey building were designed by consultancy Couch Perry Wilkes, with SAS installing the ISMs and bespoke flat modules on behalf of M&E contractor EMCOR.
John Hauton, mechanical associate director for Couch Perry Wilkes, tells us, ‘The Police Federation was keen to embrace the low-energy proposals and sustainable design put forward by the design team. The SAS chilled beams and integrated beams provide an ideal solution for some important areas.
‘They have interfaced well with the exposed slab and provided a good-quality finish to these high-profile areas. SAS have developed some bespoke units, in budget, that suit the specific needs in these key areas.’
The active ISMs provide 700 to 800 W of cooling and about 550 W of heating per linear metre. Fresh air is supplied at 12 l/s per person.
Figures for the passive ISMs are 185 W/m of cooling with room air velocities of less than 0.25 m/s.
Flow and return water temperatures for both types of beam are 14/17°C — temperatures that are compatible with free-cooling and ground-cooling systems. Night cooling is used in this building to pre-cool exposed mass during the summer.