Pilot Project – Brf Östertull, Uppsala

Net Zero Case Study

‍

Property profile

‍
Brf Östertull is a large residential association with high and stable heating demand. Annual energy consumption is approximately 4 million kWh, making even small efficiency gains financially and environmentally significant.

The 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.

‍

Solution

‍

The AEGIR Impulse system was installed on the closed-loop radiator 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 modifications or chemicals were used.

‍

Measured Energy Consumption

‍

Month 2024 (MWh) 2025 (MWh)
January 595 487
February 476 447
March 432 364
Total Jan–Mar 1503 1298

Verified Results

• 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

‍

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:
  ‍

Radiator and piping systems estimated to gain ~15 additional years of operational life due to reduced corrosion, scaling, and thermal stress.

‍

Net Zero Relevance

• Direct reduction of energy use and CO₂ emissions in residential housing
• 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

‍

Project Holders

• Steven Sabok Roh
• Anton Johansson
• Lennie Wallström
• Christer Larsson

‍