Patent ID: 6176305
Filing Date: 2001-01-23
Classification: F24F,F28D,F28F,Y02B

Abstract:
A method of ventilating an enclosed space using an air handling system including an isolating heat exchanger for conducting exhaust air from said enclosed space and outside air into said enclosed space and exchanging heat between said exhaust air and said outside air while isolating the flows of said outside and exhaust air from one another, an enclosed space air temperature sensor, an outside air temperature sensor, a first fan to move said exhaust air through said heat exchanger, a second fan to move said outside air through said heat exchanger, and a programmed controller for controlling the flow of said exhaust air and said outside air and the heat transfer therebetween, said method comprising:(a) during a first cooling mode, causing heat to be transferred from said outside air to said exhaust air when the outside air temperature is greater than a desired enclosed space temperature;(b) during a second cooling mode, reducing or eliminating the transfer of heat from said exhaust air to said outside air through said heat exchanger when said outside air temperature is lower than said desired enclosed space temperature, and said space temperature is greater than said desired space temperature.