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繁體中文Optimizing Energy Use: Stockholm Exergi's Digital Retrofit for Sustainable Buildings
10/20/2025Stockholm Exergi, a Swedish energy firm, is upgrading residential structures in the capital using ebm-papst neo’s gateways, sensors, and Sweden-developed EC roof fans. This setup enables demand-driven ventilation, cutting heating energy and other costs by up to 40% via digitalization.
The company aims to supply heat to 800,000 people and generate electricity more sustainably, with a target of climate neutrality by 2032. To achieve this, it focuses on renewable energy, recycled energy, and tech-driven urban modernization—including retrofitting buildings with ventilation and AC systems that recover heat, critical for cold Scandinavian weather (open-window ventilation wastes too much heating energy).
A pilot project in Östermalm’s Gyllenstiernsgatan neighborhood showcases this approach. It uses ebm-papst’s full solution: the Swedish MXRC III EC roof fan (60% more energy-efficient than its predecessor) and the new IntelliGate Air X gateway controller, which includes sensors and cloud integration. The fan runs efficiently, on demand, and with minimal vibration to avoid disturbing residents.
The gateway links the fan to external sensors and the cloud via an integrated Narrow Band IoT modem, allowing independent data transmission without relying on local networks. Erik Brisenheim, ebm-papst Sweden’s Technical Manager, highlights this network independence. The system enables remote monitoring and automatic, continuous control of ventilation, while sensors adjust airflow to reduce costs. Cloud-based data and analyses give operators clear insights into ventilation frequency and energy use. For residents, the key benefit is better living comfort through consistent air quality.
This Östermalm project is just the start; Stockholm Exergi plans to modernize more buildings to boost energy efficiency, supporting Stockholm’s broader emission reduction goals.
