Please rotate your device

Your building consumes energy to achieve comfort and a healthy indoor climate. In most buildings, a lot of this energy is wasted.

No matter how many renewable resources you have, achieving net-zero carbon is only possible if you understand how your buildings perform and eradicate this waste.

A boiler that is heating to 70 degrees when only 50 is required is wasting energy. Temperature monitors and presence detectors can help to make sure that the systems are working correctly and only when needed.

Data from heating and cooling systems allows us to identify inefficiency and energy saving opportunities.

We collect data from systems, sensors and meters to help you detect energy waste and poor indoor conditions so you can keep your building performance on track to achieve your goals and targets.

"By identifying and measuring the energy waste in your operational systems, we give you all the information you need to stop the waste. Once you’re able to measure and monitor your building’s performance, you are back in control. The performance reports can be used internally or shared with all your stakeholders."

By translating the right data into actionable information, we give you everything you need to deliver better spaces and set and reach targets. See how well your spaces perform and share the results of your efforts directly with stakeholders.

Hi, I'm James. When I founded Sirus in 1988, we focused on developing Building Management systems that reduce energy waste and...[click me to read more]

"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.

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."

What floor?

This website is tailored to your needs. What area has your focus?


Your building consumes energy to achieve comfort and a healthy indoor climate. In most buildings, a lot of this energy is wasted.
No matter how many renewable resources you have, achieving net-zero carbon is only possible if you understand how your buildings perform and eradicate this waste.

  • Temperature monitors and presence detectors can help to make sure that the systems are working correctly and only when needed

  • Simultaneous heating and cooling adjacent spaces decreases comfort and creates waste

  • A boiler that is heating to 70 degrees when only 50 is required is wasting energy. Temperature monitors and presence detectors can help to make sure that the systems are working correctly and only when needed.

  •  
  •  

We collect data from systems, sensors and meters to help you detect energy waste and poor indoor conditions so you can keep your building performance on track to achieve your goals and targets.

Analysis of operational data allows you to identify inefficiency and energy waste in your HVAC systems.

Send data

The combination of meter data and operational data allow you to quantify potential energy, emission and cost savings as well as validating results after changes are made.

Send data

Onsite generation needs to be paired with reductions in energy consumption if Net Zero targets are to be achieved.

Send data

Go ahead - send the data!

  • Hi Joe, I see the heating in the KPN offices is running very high and the CO2 isn't great either

  • Perfect, can you send me the latest Sustainability report for their offices when you are done? I want to share it with their facilities manager

  • Thanks John, I'll look into it ASAP

  • Will do

“By identifying and measuring the energy waste in your operational systems, we give you all the information you need to stop the waste. Once you’re able to measure and monitor your building’s performance, you are back in control. The performance reports can be used internally or shared with all your stakeholders”

Get insights into your building’s performance, identify waste and set and reach targets.

See your progress on your road to net-zero and share the visuals in magazines.

Download reports and share these directly with your stakeholders

"Within days of starting a trial with OPNBuildings we identified a number of operational and energy saving improvement opportunities within our buildings. After successfully using the software within two of our pilot buildings, we then extended monitoring across all of the Irish Water offices. Continuous Monitoring and Reporting enables the FM Department to measure and demonstrate the performance of our office led assets."

Dermot Walsh
Energy and Systems Manager, Irish Water

James Byrne

Company Founder

The face of OPNBuildings - whether he likes it or not

Filip

Operator Extraordinare

Juggling code, baseballs, and drumsticks like a pro

Tony O’Keeffe

Chief Operational Officer

The one who keeps forgetting to update his photo.

Keith Lyons

Non-Executive Director

Software Developer extraordinaire.

Frank Caul

Company Founder

Industry dinosaur who should be enjoying his retirement but most likely never will.

Nicholas Sotiriou

Lead Backend Developer

Wannabe chess prodigy. Thirty years too late.

Per Johansson

Software Development Manager

Smashing bugs and tennis balls with equal precision.

Steve Loughney

Non-Executive Director

Senior business leader, value-finder and solution-identifier

Myra Kokke

Marketing Manager

Has more coffee than blood running through her veins.