German Engineering Expertise for Carbon Neutral Building Solutions
Independent energy and sustainability consulting for cities, industries, and investors focused on reducing CO₂ emissions through smart and reliable energy solutions.
Your Partner for Economic Decarbonization
We develop CO₂ and energy strategies that combine regulatory compliance, measurable savings, and long-term value creation.
Our approach bridges engineering precision with strategic foresight – verified, data-driven, and result-oriented.
Shaping Tomorrow's Sustainable Assets - Today
We help building owners, investors, and public entities turn sustainability goals into profitable action.
Our mission: measurable decarbonization, verified impact, and visible results
“Sustainability is not an add-on- it is the foundation of future value”
Our 3-Phase Path to Net Zero
Our 3-Phases leads you from initial audits to profitable CO₂ and cost reductions — with clear and proven steps on international standards.
Analyze
Identify CO₂ hotspots and Roadmap to net zero
Strategize
Combine efficiency, renewable energies and innovation profitably.
Implement
Track and sustain real savings.
Need only specific support?
Choose from our modular consulting services tailored to your needs
Smart System to Net Zero - BLUE COOL ZEROᵉ
In the Middle East, sunlight and natural gas are abundant — yet cooling energy, electricity, and water are the true essentials.
BLUE COOL ZEROᵉ transforms this abundance into life-sustaining resources: using solar thermal power, natural gas, biogas, hydrogen, and geothermal energy to generate cooling energy, power, and pure water — efficiently, continuously, and CO₂-neutral.
It’s a smart transformation system engineered for the region’s climate and ambition — delivering comfort, resilience, and sustainability from what nature already provides
Turning Abundance into Essentials – The Future of integrated Energy
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Your Success is Our Mission
Founded and led by German Consulting Engineer Winfried Haas, Haas Sustainable Consulting stands for independent, technically sound and economically proven energy strategies.
30+ years of experience in Europe’s most advanced efficiency and decarbonization projects – now available for your sustainability transformation.
German Expertise – Trusted Worldwide
Building Types We Serve
Commercial & Residential
Energy-efficient solutions for office towers, hotels, resorts, malls, and convention centers – reducing costs while enhancing comfort and prestige
Public Buildings
Supporting government offices, theaters, opera houses, museums, and cultural landmarks with sustainable upgrades that meet global standards and secure long-term value.
Data Center & Factories
Independent consulting for factories, data centers, cold storage, and utilities – delivering verified savings and future-proof performance.
Urban Quarters & Districts
Comprehensive sustainability concepts for entire neighborhoods, urban districts, and smart cities – from energy roadmaps and district cooling to Net Zero infrastructure and climate-ready communities.
Why Work With Us
German Engineering with Awarded Track Record
Trusted precision and 30+ years of experience in energy efficiency, renewable energy and CO₂-reduction strategies. Proven results and a certified, award-winning track record from complex transformation projects in Germany and internationally.
Economic Value through Climate Strategy
Strategic CO₂ roadmaps focused on ROI, operational cost savings, and funding opportunities. From short-term quick wins to performance-based models like Energy Performance Contracting (EPC), we deliver impact and economic value.
Independent and Trusted Partner
As an independent advisor, we act solely in your best interests—free from supplier influence. With strong personal commitment and culturally sensitive collaboration, we build lasting loyalty through reliability, discretion, and long-term thinking, always aligned with your values and vision.