The ENSNARE project aims not just to transform buildings, but to transform the way we think about retrofitting-, from static upgrades to fully digital, interconnected ecosystems. At the heart of this transformation is the development of a smart Building Management System (BMS), acting as the “brain” behind our digital toolbox.

The Tartu demo site in Estonia has offered invaluable insights into how this smart, sensor-rich approach performs in real-world conditions. Here’s what we’ve learned.

Digitisation Enables Remote Commissioning

One of the most promising outcomes from the Tartu demo is how digitisation allowed the commissioning of systems to be carried out remotely — almost entirely online. The demonstration of this digital ecosystem in Tartu (set of sensors, data acquisition to store data from sensors on the cloud, real time remote control of all equipment), allowed for a remote commissioning, where all the parameters could be checked, operated and modified online by Tecnalia.

While a local installer was on hand to assist when needed, nearly 95% of the commissioning process was handled online. All systems — including ventilation, energy harvesting, and storage — could be monitored and controlled via the cloud, with instant feedback. 

This represents a step forward in how retrofitting projects can be managed and scaled, especially across different geographies. As, even though this type of remote commissioning exists, there are still very few installations at residential level with this ambition. 

A Smart BMS as the Digital Ecosystem’s Core

The ENSNARE BMS goes beyond energy monitoring. It’s designed to optimize building performance using real-time data and predictive modelling, thanks to the IES developments, balancing energy consumption with health and comfort indicators. It also enables smart interactions with energy grids, allowing import/export based on availability and tariffs — a key feature for future-ready buildings.

By integrating this system into the building in Tartu, we demonstrate both the physical ENSNARE developments  but also the multifunctional ecosystem that can multiply the impact of energy retrofits.

Living with the Tech: What the Residents Are Saying

The renovated building is now home to residents who are already experiencing improved comfort levels. According to ENSNARE’s Estonian demo coordinator, people are happy with the living conditions that have been prepared for them.

However, like any innovative system, it hasn’t been without its challenges. Minor issues with BMS compatibility and module integration are being actively monitored and resolved — an expected part of deploying such advanced technology.

Digital Complexity vs. Long-Term Benefits

One key takeaway has been the complexity of managing a highly digitalised system. The installation and commissioning phases were more demanding than expected, largely due to the volume of sensors and automations. For building managers unfamiliar with digital systems, this can be overwhelming.

Counting with a facility manager with expertise in smart building technology made this challenging process smoother, as was pointed out by the Estonian demo coordinator. This is an important consideration for future replications: complex systems require skilled operators — not just during setup, but throughout the building’s lifecycle.

Final Reflections: Challenges and Opportunities

Despite the success of the Tartu demo, some challenges remain. As with many construction projects, fine-tuning continues even after occupancy. Solving technical issues becomes more complex once residents move in — making timing and coordination key.

Moreover, while smart systems offer powerful optimisation tools, they demand ongoing attention and the availability of expert personnel. In this context, having a long-term agreement with a skilled technician or facility manager is not just advisable — it’s essential.

Conclusions

The Tartu demonstration confirms that digitisation can be a game changer for energy retrofitting. Remote commissioning, real-time system optimisation, and deep integration of smart technologies are no longer future concepts — they are happening now.

As we analyse the data and continue refining the system, the lessons from Tartu will help us scale the ENSNARE approach — building not just smarter homes, but a smarter future.