OKELIS launch on social,
September 2026.

Something new is coming to Abu Dhabi. OKELIS is a sustainability and building-performance consultancy working across the built environment in Abu Dhabi and the wider GCC. We bring certification, carbon accounting and advanced simulation together in one technical team, so that a rating, a target or a disclosure is supported by analysis a third party can reproduce. Our team holds Pearl Qualified Professional and Independent Commissioning Agent appointments, with 25 projects delivered under the Abu Dhabi Estidama Pearl Rating System. Follow along. We are opening this month.

Most projects buy sustainability in pieces. A certification consultant here, an energy modeller there, a carbon accountant somewhere else. The numbers rarely agree, because they were never built on the same model. OKELIS runs them together. Energy, daylight, carbon, cost and certification come off the same geometry and the same assumptions, so findings in one discipline immediately inform the others. No re-basing. No contradictory reports. Seven integrated service lines, coordinated rather than subcontracted.

Our website goes live this month. It will carry the full picture: the seven service lines, the standards we work to, the sectors we serve, and how an OKELIS engagement actually runs from objective through to verification in operation. What it will not carry is an unsupported claim. Every published figure traces to a model run, a measurement or a documented emission factor, and the assumptions travel with it. 25 Estidama projects delivered. PQP and ICA appointments held in-house. Two Pearl, the highest rating we have delivered.

World Green Building Week runs from today to 11 September. This year's theme, #BuildItReady, asks for buildings that are resilient, efficient and built for opportunity. Each of those is a number before it is a claim. Resilient is a thermal model under a future weather file. Efficient is energy use intensity in kWh per square metre per year, against an ASHRAE 90.1 Appendix G baseline. Built for opportunity is a whole-life cost over a defined study period, set beside the carbon it avoids. OKELIS is now live. We run all four of these as one connected system: certify, measure, optimize, decarbonize.

Twenty-five projects delivered under the Abu Dhabi Estidama Pearl Rating System. Schools, mosques, hospitals, villas, commercial towers, residential buildings and a hyperscale data centre. Different occupancy patterns, different internal gains, different ventilation duties, and therefore different strategies. The analysis is set up per sector, not per template. Our Pearl Qualified Professional and Independent Commissioning Agent appointments are held in-house and carried on our own projects, not subcontracted. We stay engaged through construction-stage compliance, submission and final award, which is the stage at which certifications are most often lost.

Whole-building energy modelling to ASHRAE 90.1 Appendix G. The performance rating method compares a proposed design against a baseline building generated by rule. The savings you can claim depend entirely on how that baseline is constructed: the envelope assumptions, the system type, the fan power, the operating profile, the weather file. Set it loosely and the model flatters the design. Set it properly and it tells you which measures actually earn their cost. We document the assumptions so the result can be checked by a third party, and we report energy use intensity in kWh per square metre per year against a stated baseline.

Daylight simulation to IES LM-83. Two metrics carry most of the decision. Spatial Daylight Autonomy is the percentage of floor area meeting a target illuminance for a set proportion of occupied hours. Annual Sunlight Exposure is the percentage receiving too much direct sun, which is how you catch glare before the occupants do. In this climate the two pull against each other constantly. More glazing lifts sDA and pushes ASE past the point where blinds go down and stay down, at which point the daylight you modelled stops existing. Shading geometry, glazing selection and room depth are resolved together, early, while they can still be changed.