Patent ID: 11927358
Assignee: JOHNSON CONTROLS TYCO IP HOLDINGS LLP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 15:
16. A heating, ventilating, and air conditioning (HVAC) system configured to supply air to a conditioned space, comprising:
a variable-speed exhaust fan configured to expel air from the HVAC system;
a constant-speed exhaust fan configured to expel air from the HVAC system; and
a tangible, non-transitory, computer-readable medium storing instructions that, when executed by processing circuitry, cause the processing circuitry to:
receive data indicative of an air pressure within a room of the conditioned space;
receive an air pressure setpoint from a control device disposed within the conditioned space;
determine a difference between the air pressure and the air pressure setpoint; and
control the variable-speed exhaust fan and the constant-speed exhaust fan based on the difference between the air pressure and the air pressure setpoint.