• Direct driven axial fan

ESCO projects in Jyväskylä, Finland

Service Areas

  • Advisory Services
  • Project Management
  • Project Execution


  • Ventilation & Air Conditioning
  • Electricity



  • Old ventilation fans
  • Improved indoor air conditions


  • Renewal of all 1- and 2-speed ventilation fans, approximately 120 pieces in total, in 16 public buildings
  • Replaced with direct driven axial fans with frequency converter controllers
  • Achieved savings with energy-efficiency and frequency converter controls as well as, in some locations, a heat recovery solution
  • Financed with a five-year ESCO saving and financing contract
  • Measured decrease in energy consumption is 25% on average.
  • 25% decrease in energy consumption

    Direct driven axial fan

    • Improved efficiency
    • No narrow blower gap, decreased pressure loss, decreased energy consumption
    • No dust and no belt changing costs