The hvac_distribution element is a child of the hvac element. You can submit up to 3 instances of the hvac_distribution element for each hvac instance.


  • The name element must be submitted in order to identify the correct instance of hvac_distribution
  • The sum of the fraction values for all three instances must equal 100
  • The following heating and cooling types must have a distribution system: central_furnace, heat_pump, gchp, split_dx