
Building Performance Engineers with the Power of AI
About Us
CSR Sustain Ltd is a team of expert Building Performance Engineers, specialising in AI-powered HVAC optimisation for commercial real estate.​
We help asset owners unlock immediate and long-term value from their buildings by enhancing energy efficiency, reducing maintenance costs, and improving occupant comfort. Our work is powered by PEAK by CIM, a globally proven, AI-driven building analytics platform.​
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As a CIBSE-certified consultancy, we combine engineering expertise with cutting-edge technology to deliver measurable improvements in Net Operating Income (NOI), sustainability ratings, and compliance with evolving building performance standards.
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Whether you manage a single building or a nationwide portfolio, CSR Sustain provides the tools, insight, and support to optimise performance, today and for the future.
Meet The Team
Optimise. Perform. Sustain
Our team of expert building performance engineers and sustainability professionals combines deep HVAC technical expertise with financial and ESG insight - delivering smarter, more efficient, and future-ready buildings.

Craig Kefford
Energy Consultant
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