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Hi, I'm James. When I founded Sirus in 1988, we focused on........................

HI, I'm James. When I founded Sirus in 1988, we focused on developing Building Management systems that reduce energy waste and improve a healthy work environment. Nearly 40 years later, the pressure to demonstrate how well your buildings perform has only increased.

Decarbonisation is non-negotiable. Ensure it becomes a strategic business advantage, not a risk for your investors. Low-energy buildings are more financially beneficial to tenants and owners, and they help organisations to meet their decarbonisation goals.

Achieving net-zero carbon is only possible if you understand how your buildings perform. The right balance between generation and performance is essential to set and reach targets. But there's a little more to it...

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For every stage of your sustainability journey

OPNBuildings provides the tools, technology and human support for you to plan, measure and report on your sustainability efforts.

quotation mark “Sustainability isn’t just about reporting numbers. It’s about understanding the story behind the data, using it to guide your decisions, and communicating it in a way that makes sense to every stakeholder.”

signature from James READ THE LETTER OF OUR CEO >

Your sustainability journey starts here.

Ambitious sutainability targets are great - but without a clear understanding of your current situation, mapping the path to success is nearly impossible. To begin any journey, you first need to know where you’re starting from.

This doesn’t require numerous energy meters or vast amounts of data—just the right insights. We help organisations get a clear picture of where they stand today, so they can take confident, data-driven steps towards their sustainability goals.

Efficiency first: the smart start to decarbonisation

After understanding the scale of your challenge, the key is to break it down into actionable steps. The smartest way to begin is to focus on energy efficiency. Reducing energy consumption first can have significant knock-on benefits, making the biggest impact before investing in renewables or fuel shifts.

Our specialised tools help you to identify, quantify, and prioritise efficiency opportunities across your assets, so you can take a strategic, data-driven approach to sustainability.

Prioritise, adapt, and stay on track.

Sustainability isn’t a one-time plan—it’s a journey. Reaching your sustainability goals takes more than just setting a strategy; it requires ongoing reassessment and flexibility. While many organisations prioritise opportunities early on, real progress comes from adapting along the way.

Our advanced tools keep your strategy dynamic, with real-time updates and data-driven insights—so you can stay on track without the limitations of manual planning.

Measure progress and achieve goals.

Sustainability is an ongoing journey, and staying on track requires continuous monitoring—not just annual reviews.

Our tools help you measure and monitor your decarbonisation progress in real-time, providing clear insights into your energy use and the impact of your actions.

With easy-to-use reporting and analysis, you can make informed decisions and stay aligned with your sustainability goals.

Make better decisions with the right information.

We help you understand what the data is telling you, interpreting and delivering insights that can guide your decisions. We connect the dots, so you can lead with confidence.

GET IN TOUCH

What our clients have to say.

quotation mark “Our experience with OPN has been seamless and highly engaging. Their team is incredibly receptive to new ideas, continuously enhancing their platform to meet our evolving needs. The intuitive and user-friendly interface has made navigation effortless, and we anticipate even greater in-house engagement once our Significant Energy User (SEU) dashboard is fully implemented. Additionally, the data integration and validation service, delivered in collaboration with GLAS Energy Technologies, has been outstanding—ensuring challenges are swiftly identified and efficiently resolved.”

Carlos Sullivan
Environmental Installation Manager at Architectural Metal Systems

What our clients have to say.

quotation mark "OPN supported us in implementing their site Energy Monitoring System over the past year, and the entire process—from design to implementation and follow-up training—was faultless. We've had a positive experience throughout, with consistently excellent support from the OPN team. The system itself is user-friendly, and the team tailored it precisely to meet our specific needs."

Jamie McMahon

What our clients have to say.

quotation mark "OPNBuildings is an outstanding energy and emissions monitoring platform, delivering powerful insights through an intuitive and easy-to-use interface. The team is knowledgeable, responsive, and a pleasure to work with—their support and expertise have made a real impact in helping us optimise energy performance and progress our sustainability journey."

Jobin Charapparambil
HSE Coordinator UK&I at Dentsu

Insights, news and fresh
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