Technical Info

Calculation of air flow volume

• using air change rate
• using the number of people in a room
• using maximum pollutant concentration levels
• using the amount of humidity
• using the heat to be extracted

Acoustic, noise levels

• Sound power – Soundpressure
• Sound emission levels affecting the neighbourhood
• Noise levels for working environment
• Addition of several noise sources

Pressure losses in ductwork

Performance curves

Fan performance units

IP ratings

Explosion proof protection

• Zone definition, Product group, Product categories
• Enclosures (motor and terminal boxes): Types of protection
• Ignition-, Surface temperature and Temperature class
• Ignition temperature (to VDE 0165/DIN EN 50014)
• Operation

Motor protection

• Motors with thermal contacts
• Motors with thermal contacts wired in series with the motor windings
• Motors with built-in PTC thermistors
• Motors without thermal contacts

Speed control

• Controllers
• Electronic speed controllers
• Comparison of different control methods

Our hotline service

• Germany
  Tel.: +49 (0) 7720 606-266
  Email: info @ heliosventilatoren.de
• Austria:
  Tel.: +43 (0) 512 26 59 88
  Email: info @ heliosventilatoren.at
• Swiss:
  Tel.: +41 (0) 44 735 36 36