NSI Portfolio

Combining different buildings, installations, and building management systems into one central software platform

By onboarding a big part of their real estate portfolio onto the Smart Building Platform, NSI gains greater insight into the performance of the individual buildings and the portfolio as a whole, reporting becomes easier and the 26 onboarded buildings will have both improved climate conditions and lower energy usage.
DATE January 2021 – December 2021

Transitioning to energy-efficient buildings is a paramount challenge in the Dutch energy transition due to increasing demand for those buildings, as well as harsher requirements set by the government. Nonetheless, inefficient use of energy is still a common practice in many office buildings due to their inflexible building management systems. The Smart Building Platform uses self-learning algorithms to increase energy efficiency by using real-time weather and consumption data. The Smart Building Platform will be used in 28 buildings, which differ greatly in size, building year, surface area and climate control.

Onboarding different types of buildings with differing building management systems which are used for different purposes and use different maintenance companies is a big challenge. How do we compare these 26 buildings in a way that makes sense? 


Having to compare different systems meant further developing our typologies and control strategies. We were rewarded a DEI subsidy to support this development. Our first step was to collect and upload the portfolio data, like addresses and the building specifics. We went on to connect all smart meters. At the same time, we connected the BMSes and started gathering data. After about 3 months of data collection, we did an extensive functional performance check on all installations and coordinated with the installation maintenance companies. After all systems and buildings passed those checks, we started actively controlling the HVAC systems in the buildings and started saving energy.


Autonomous, intelligently controlled buildings that are comfortable, healthy, and waste no energy.

We expect to save 20% of the gas usage (and thus costs) and 3% of the electricity usage. We expect to maintain or even improve on the current climate conditions. Those numbers result in 764 tonnes of CO2 reduction yearly.

"The first step to saving is to combat waste. Spectral’s Smart Building Platform helps us to make our tenants’ buildings more efficient, more sustainable, and more comfortable."
Jeroen Solleveld
Head of Technical Asset Management, NSI
Jan van Noordenne
Venture Director
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