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

Claim 0:
1. A heating, ventilating, and air conditioning (HVAC) system, comprising:
a variable-speed exhaust fan configured to discharge air from the HVAC system;
a constant-speed exhaust fan configured to discharge air from the HVAC system; and
a controller configured to:
receive data from a pressure sensor indicative of an air pressure within a conditioned space serviced by the HVAC system;
receive an air pressure setpoint associated with the conditioned space; and
modulate the variable-speed exhaust fan and control supply of electrical power to constant-speed exhaust fan based on a difference between the air pressure and the air pressure setpoint.