mechanical   electrical  
acoustics cold water systems main distribution systems fire protection
boiler & calorifier plant hot water systems small power access control
air conditioning hot water systems sub-main distribution door entry
comfort cooling industrial systems interior lighting public address
thermal analysis hthw systems emergency lighting telecommunications
chilled water services ventilation exterior lighting data
main distribution systems gas systems lighting protection intruder alarms
water treatment systems pipework systems radio & tv distribution  
public health systems ductwork systems fire detection & alarms sap ratings