Property: Tyresö Centrum
Location: Tyresö, Sweden
Sector: Retail
Year built: 1965
Area: 45,000 m2
Energy solution: Integrated energy system with BTES, waste heat recovery from grocery stores, and thermal network for cooling
Heating capacity: 800 kW
Cooling capacity: 850 kW
Heating delivery: 3550 MWh/year
Cooling delivery: 1200 MWh/year comfort cooling + 800 MWh/year process cooling
Purchased energy reduction: 65% (83 kWh/m2/year to 28 kWh/m2/year)
CO2 reduction: 90% reduction in operational CO2e emissions, excluding electricity source
Tyresö Centrum, a 45,000 m² shopping centre built in 1965 and located just outside of Stockholm, is entering a new era of energy efficiency and sustainability. The shopping center, owned by Skandia Fastigheter, will have its existing district heating system and conventional cooling machines replaced and optimized with an integrated heat pump solution from Energy Machines. The new facility is based on electrified heat pumps that collect and store energy in a borehole storage, enabling a highly resource-efficient production of both heating and cooling. Existing district heating and chillers are retained for peak load and redundancy.
At the heart of the solution is an innovative combination of Borehole Thermal Energy Storage (BTES) and waste heat recovery from the centre’s grocery stores, ICA and Coop. Fifty-five boreholes, each 300 meters deep and located beneath the parking garage, work together with seven Energy Machines™ heat pumps with a total capacity of 800 kW heating and 850 kW cooling. The heat pumps utilize natural refrigerant, propane.
Approximately 30–40% of the heating demand will be covered by recovered waste heat, with the remainder supplied by geothermal energy. Peak heating, covering the coldest hours of the year, is covered by the existing district heating connection.
The system also transforms previously separate cooling “islands” into a connected thermal network. By linking existing primary and secondary systems, every cooling producer can now support the entire property, and the most efficient unit always starts first. Surplus energy is either reused instantly or stored in the BTES for later use.
The new system is expected to reduce purchased energy consumption by around 65% (from 83 to 28 kWh/m² per year) and cut CO₂ emissions by roughly 90%, excluding electricity source (from 13.1 to 1.4 tons/year). Beyond the numbers, the solution creates a flexible thermal network that maximizes already-available energy and reduces reliance on external sources.
For Skandia Fastigheter, the choice of Energy Machines builds on proven trust and performance. Previous collaborations, including the geothermal transformation of Frölunda Torg shopping centre – now in operation for six years and exceeding performance expectations, and the recently commissioned mixed-use property Alpha Backaplan – have demonstrated both technical capability and long-term reliability.
“This project is a central part of our long-term sustainability efforts at Tyresö Centrum. By investing in a smart and circular energy solution, we can both help meet our owners’ ambitious sustainability targets and at the same time future-proof the property. We are taking an important step toward becoming a taxonomy-aligned property and moving closer to being among the 15 percent most energy-efficient retail destinations in Sweden. It shows that real sustainability is about combining climate benefits with business value,” says Helén Eijdercrona, Centre Manager of Tyresö Centrum.
“Sustainability and profitability don’t have to be at odds. On the contrary, they can go hand in hand. At Tyresö Centrum, we’re transforming waste heat and geothermal energy into a strategic asset for Skandia Fastigheter. This delivers significantly reduced emissions, lower energy consumption, and a future-proof energy solution. That’s how we view modern property development,” adds Martin Stålnacke, Business Manager at Energy Machines.
With this project, Tyresö Centrum demonstrates how older buildings can embrace modern, energy-smart technology and make tangible strides in their green transition. These improvements are realized not through physical upgrades to the building envelope, but through a transformation of the energy system itself. It’s a meaningful step forward not just for the shopping centre, but for sustainable building solutions in Sweden and everywhere.
