U.S. Department of Energy Energy Efficiency & Renewable Energy U.S. Department of Energy Energy Efficiency & Renewable Energy

Balanced System

Question: 

The definition of a balanced HVAC system is:

  1. A system that operates under neutral pressure, where the amount of air blowing out the supply ducts should match the amount of air getting pulled into the return ducts.
  2. A system that operates under positive pressure, where the amount of air blowing out the supply ducts is greater than the amount of air getting pulled into the return ducts.
  3. A system that operates under negative pressure, where the amount of air blowing out the supply ducts is less than the amount of air getting pulled into the return ducts.