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Calculation Examples

Rosenberg EC fans have a high energy saving potential at full load, especially at part load. Under the same airflow, the efficiency loss is significantly lower than that of traditional AC motors. The improvement in energy efficiency has led to a 2-year reduction in carbon monoxide emissions. In addition, the investment cost of fan speed control is low. No control transformers, frequency converters or phase angle controllers are required. All necessary components are included in the EC motor electronics. Rosenberg modern EC technology is not only wallet-friendly, but also very friendly to the environment.

 

Representative calculation example:

» EC centrifugal fan

Energy saving potential of EC centrifugal fans, size 560

Working point Short Term 100% Daytime operation 80% 60% night operation  
Air volume 8.000 m3/h 6.400 m3/h 4.800 m3/h  
Static pressure 500 Pa 320 Pa 180 Pa  
Power supply EC1) 1.940W 1.040W 483W  
Power AC2) 2.650W 1.810W 1.080W  
Daily running time 2 hours 10 hours 12 hours  
  Total annual energy consumption  
Power consumption EC 1.416 kW Hour/year 3.796 kW Hour/year 2.116 kW hours/year 7.328 kW hours/year
Power consumption AC 1.935 kW hours/year 6.607 kW hours/year 4.730 kW Hour/year 13.271 kW Hour/year
         
Savings 518 kW hour/year 2.811 kW hours/year 2.615 kW Hour/year 5.944 kW hours/year
Percentage of savings 26,8 % 42,5 % 55,3 % 44,8 %
         
  Annual cost savings3) 1.189 euros
  Annual emission reduction4) 3,60 tons of carbon monoxide2

1) Type: EHAG 560.6IF • 2) Comparable AC fan•3) Electricity charge per kilowatt hour: 0,20 Euro• 4） 来源：Umweltbundesamt （0,605 kg CO2/kWh)

» EC tube fan

Energy saving potential of EC tube fan, size 250

Working point Short Term 100% Daytime operation 80% 60% night operation  
Air volume 500 m3/h 400 m3/h 300 m3/h  
Static pressure 300 Pa 192 Pa 108 Pa  
Power supply EC1) 111W 59W 26W  
Power AC2) 165W 111W 74W  
Daily running time 2 hours 10 hours 12 hours  
  Total annual energy consumption  
Power consumption EC 81 kW Hour/year 215 kW Hour/year 114 kW Hour/year 410 kW hour/year
Power consumption AC 120 kW Hour/year 405 kW Hour/year 324 kW Hour/Year 850 kW Hour/year
         
Savings 39 kW Hour/year 190 kW Hour/year 210 kW Hour/year 439 kW Hour/year
Percentage of savings 32,7 % 46,8 % 64,9 % 51,7 %
         
  Annual cost savings3) 88 euros
  Annual emission reduction4) 0,27 tons of carbon monoxide2

1) Type: R 250 G.3BK • 2)Comparable AC Fan •3) Per kilowatt-hourElectricity bill: 0,20 Euros• 4） 来源：Umweltbundesamt （0,605 kg CO2/kWh)

» EC duct fan

Energy Saving Potential of EC Duct Fans, Size 400

Working point Short Term 100% Daytime operation 80% 60% night operation  
Air volume 2.500 m3/h 2.000 m3/h 1.500 m3/h  
Static pressure 250 Pa 160 Pa 90 Pa  
Power supply EC1) 374W 209W 102W  
Power AC2) 492W 368W 248W  
Daily running time 2 hours 10 hours 12 hours  
  Total annual energy consumption  
Power consumption EC 273 kW hours/year 763 kW hours/year 447 kW hours/year 1.483 kW hours/year
Power consumption AC 359 kW hours/year 1.343 kW hours/year 1.086 kW hours/year 2.789 kW hours/year
         
Savings 86 kW hours/year 580 kW hours/year 639 kW hours/year 1.306 kW hours/year
Percentage of savings 24,0 % 43,2 % 58,9 % 46,8 %
         
  Annual cost savings3) 261 euros
  Annual emission reduction4) 0,79 tons of carbon monoxide2

1) Type: KHAG 400.5FA • 2)Comparable AC Fan •3) Per kilowatt-hourElectricity bill: 0,20 Euros• 4） 来源：Umweltbundesamt （0,605 kg CO2/kWh)

» EC Roof Fan

Energy saving potential of EC roof fans, size 450

Working point Short Term 100% Daytime operation 80% 60% night operation  
Air volume 4.000 m3/h 3.200 m3/h 2.400 m3/h  
Static pressure 360 Pa 230 Pa 130 Pa  
Power supply EC1) 791W 422W 198W  
Power AC2) 983W 632W 358W  
Daily running time 2 hours 10 hours 12 hours  
  Total annual energy consumption  
Power consumption EC 577 kW hours/year 1.540 kW hours/year 867 kW hours/year 2.985 kW hours/year
Power consumption AC 718 kW hour/year 2.307 kW Hour/year 1.568 kW Hour/year 4.592 kW hour/year
         
Savings 140 kW Hour/year 767 kW hour/year 701 kW hours/year 1.607 kW Hour/year
Percentage of savings 19,5 % 33,2 % 44,7 % 35,0 %
         
  Annual cost savings3) 321 euros
  Annual emission reduction4) 0,97 tons of carbon monoxide2

1) Type: DVW 450-G.5FA • 2)Comparable AC Fan •3) Per kilowatt-hourElectricity bill: 0,20 Euros• 4） Source: Federal Environment Agency (0.605 kg CO2/kWh)

» EC Unoboxes

Energy saving potential of EC Unobox, size 450

Working point Short Term 100% Daytime operation 80% 60% night operation  
Air volume 3.600 m3/h 2.880 m3/h 2.160 m3/h  
Static pressure 280 Pa 180 Pa 100 Pa  
Power supply EC1) 533W 289W 138W  
Power AC2) 691W 477W 290W  
Daily running time 2 hours 10 hours 12 hours  
  Total annual energy consumption  
Power consumption EC 389 kW Hour/year 1.055 kW hours/year 604 kW hours/year 2.048 kW Hour/Year
Power consumption AC 504 kW hours/year 1.741 kW hours/year 1.270 kW hour/year 3.516 kW hours/year
         
Savings 115 kW Hour/Year 686 kW Hour/year 666 kW Hour/year 1.467 kW Hour/year
Percentage of savings 22,9 % 39,4 % 52,4 % 41,7 %
         
  Annual cost savings3) 293 euros
  Annual emission reduction4) 0,89 tons of carbon monoxide2

1) Type: Uno 67-450-G.5HF • 2)Comparable AC Fan •3) Per kilowatt-hourElectricity bill: 0,20 Euros• 4） Source: Federal Environment Agency (0.605 kg CO2/kWh)