Independent Building Performance Authority
Independent building performance modelling, HVAC engineering, and technical advisory for complex projects where system performance must be validated before construction begins.
What We Do
We apply advanced simulation, building science, and performance-led HVAC strategy to de-risk complex projects before capital is committed.
Building Performance Modelling
Advanced dynamic simulation to interrogate design assumptions and optimise system behaviour.
Explore Performance Modelling
Performance-Led HVAC Engineering
HVAC system design informed by building performance modelling and quantitative analysis.
Explore HVAC Engineering
Independent Technical Advisory
Objective review of HVAC designs, contractor scopes, and performance assumptions.
Explore Technical Advisory
Selected Experience
Project experience includes work delivered through IE-GS and senior roles within leading international consultancies including Zutari and Aurecon.
Experience spans:
- High-performance commercial developments
- Institutional and healthcare facilities
- Industrial and mining cooling systems
- Net-zero and sustainable building projects
Recent IE-GS project involvement includes:
- Specialist Green Building modelling for major mixed-use development
- Mechanical design for mission-critical archival facility
- Mechanical design for industrial infrastructure
How We Engage
IE-GS is typically engaged at key decision stages where building performance has measurable financial impact.
1. Concept Design Support
Performance modelling and building science analysis to inform HVAC strategy and plant sizing decisions.
2. Design Review & Validation
Independent review of HVAC designs and performance assumptions to identify oversizing risks and coordination gaps.
3. Performance Optimisation
Simulation-led engineering used to refine HVAC system strategy and long-term operational efficiency.
4. Independent Technical Advisory
Objective technical input during procurement and construction to ensure delivered performance aligns with design intent.
Why Independent Performance Matters
Most HVAC systems are oversized.
Most design assumptions go unchallenged.
Most performance gaps are discovered too late.
Independent simulation and technical review challenge these assumptions before construction begins.
Who Are We Engaged By
We support teams where building performance has measurable financial impact.
Engineering Consultancies
Developers
Architectual Practices
High-value Residential Projects
We operate as an independent performance authority alongside engineering consultancies, contractors and developers across South Africa
Registered & Accredited Professionals
PR Eng (ECSA)
Professional Engineer registration
Green Star Net Zero AP
Sustainable building accreditation
PMP (2026)
Project Management Professional
Let’s Discuss Your Project
Engage Independent Performance Authority Before Construction
We support design teams across South Africa where building performance has measurable financial impact.
CONTACT
For project enquiries or collaboration opportunities, please contact us directly.
Email:
admin@ie-gs.com
Tel:
+27 10 143 1621
Office:
Space Building 2
Design Quarter
Fourways
Johannesburg
Gauteng, South Africa