01
Cooling plant modernization
Chillers, cooling towers, heat rejection and plant-level staging.
G4UTechnical Services
Explore the assessment
G4UTechnical Services
Retrofit & Engineering
From evidence to engineered improvement.
G4U connects energy analysis with design, equipment and material selection, controls, implementation, commissioning and performance verification.
ChillerPlant efficiency
PumpsHydraulic balance
AHUAirside demand
EvidenceM&V boundary
Engineering principle
Measure before selecting equipment.
Retrofit scope begins with the operating load, actual system condition, control response and lifecycle economics—not with a preselected equipment catalogue.
02
Pumps and water systems
Variable speed, hydraulic balance, sequencing and distribution efficiency.
03
Airside performance
AHU, ventilation, fresh-air and owner-controlled common-area optimization.
04
Controls & instrumentation
Operating sequences, approved control logic, metering and performance instrumentation.
05
Envelope & materials
Applicable insulation, glazing and efficiency materials selected against the building need.
06
Commissioning
Functional testing, recommissioning and seasonal verification where required.
Delivery chain
One verification plan from design to acceptance.
Technical scope, procurement, implementation and performance evidence remain connected throughout delivery.
01
Site evidence
Load, condition, response and operating constraint.
02
Engineering design
Selected measure, specification, risk and verification plan.
03
Implementation
Approved procurement, installation and controlled change.
04
Acceptance
Functional performance and seasonal verification where needed.
Boundary
Existing equipment protection, approved operating limits, permits, method statements and controlled-change procedures remain in force throughout implementation.
Evidence-led engineering