Patent ID: 11946661
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 5:
6. A method for heating, ventilating, and air conditioning a building having a return air duct, the building being, maintained at one or more temperatures, the method comprising:
providing a cold air airstream for distribution in the building, and a first return air damper for admitting return air from the return air duct into the cold air airstream;
providing a bypass air airstream for distribution in the building, independent of the cold air airstream, and a second return air damper for admitting return air from the return air duct into the bypass air airstream,
determining a hot ambient air condition, where the temperature of the ambient air is higher than the one or more temperatures maintained in the building; and
closing the second return air damper and using the first return air damper to provide return air to the building in response to the hot ambient air condition.