Pilot Project Brf Östertull, Uppsala

Net Zero Case Study

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Property profile

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Brf Östertull is a large residential association with high and stable heating demand. Annually 4 million kWh.

Objective of the pilot project was to reduce energy use, lower CO₂ emissions, and protect the existing heating infrastructure without chemical cleaning or system replacement.

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Solution

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AEGIR Impulse system is installed on a closed-loop radiator/circuit system. By generating nanobubbles from naturally dissolved gases in the system water, the technology improves heat transfer, removes biofilm and magnetite, and restores system balance over time.

No mechanical or chemical modifications are used

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Measured Energy Consumption

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Monat 2024 (MWh) 2025 (MWh)
January 595,487
February 476,447
March 432,364
Total Jan - Mar 1503 - 1298

Verified Resultaten

• Energy savings: 12.8%
• Cost reduction: ~164,400 SEK in approx. 2 months
• CO₂ reduction: ~11 tons in 2 months
• Investment: ~170,000 SEK
• Payback time: Within the same heating season

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Long-Term Impact

• Estimated annual savings: ~1.45 MSEK
• 10-year effect: ~14.5 MSEK in reduced energy costs
• CO₂ reduction over 10 years: ~350 tons
• System lifetime extension:
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The radiator and piping system is ~15 additional days per operation for corrosion, scale and thermal stress.

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Net Zero Relevance

• Direct reduction of energy use and CO₂ emissions in residential housing
• A highly scalable solution for housing associations and municipalities
• Supports Sweden's national climate goals and aligns with the EU taxonomy for sustainable investments
• Enables climate impact without disruptive renovations or high capital risk

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Project Holders

• Steven Sabok Spirit
• Anton Johansson
• Lennie Wahlstrom
• Christer Larsson

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