Patent ID: 11906189
Assignee: SIEMENS INDUSTRY, INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 6:
7. A method for high ventilation of outdoor air in an indoor area, the method comprising:
detecting an activation of an emergency purge mode;
adjusting at least one air damper of an HVAC unit to allow a maximum of outside air to flow through the HVAC unit without circulating return air;
establishing a fan speed of a fan of the HVAC unit for maximum outside airflow through the HVAC unit; and
modifying the fan speed of the fan based on an occupant comfort criteria, the fan speed being modified, at least in part, based on a delta enthalpy of the HVAC unit and a nominal capacity of the HVAC unit, wherein modifying the fan speed of the fan includes:
managing the fan speed, using an open loop logic, based on the delta enthalpy of the HVAC unit and the nominal capacity of the HVAC unit; and
refining the fan speed, using a closed loop logic, based on at least one of a room temperature of the indoor area or a discharge air temperature of the HVAC unit.