Patent ID: 7565924

Claim:
An air handling system for an indoor space comprising a forced indoor air treatment component, an input indoor air duct element and an output treated air duct element respectively coupling said indoor air treatment component to said indoor space, a forced fresh air ventilator component for discharging stale air from the indoor space to an outdoor environment and for replacing the discharged air with make-up air from the outdoor environment, said fresh air ventilator component comprising stale air input means coupled to a stale air output means and fresh make-up air input means coupled to a fresh air output means a stale air duct element coupled to said stale air input means and to said input indoor air duct element, a primary fresh air duct element coupling said fresh air output means to said output treated air duct element characterized in that said system comprises a further secondary fresh air path means coupling said fresh air output means to said input indoor air duct element, said further secondary fresh air path means comprising an air duct element having a first end coupled to said fresh air output means and a second end coupled to said input indoor air duct element a first air flow control means comprising a first damper element associated with said primary fresh air duct element, said first damper element being independently displaceable between a blocking configuration and a non-blocking configuration, a second air flow control means comprising a second damper element associated with said further secondary fresh air path means, said second damper element being independently displaceable between a blocking configuration and a non-blocking configuration, wherein in said respective blocking configuration, said first and second damper elements are respectively disposed to close off said primary fresh air duct element and said further secondary fresh air path means to air flow, and in said respective non-blocking configuration, said first and second damper elements are respectively disposed such that air is able to circulate through said primary fresh air duct element and said further secondary fresh air path means, wherein said second air flow control means is configured such that, when an indoor air treatment component air blower means associated with said forced indoor air treatment component and a ventilation air blower means associated with said forced fresh air ventilator component are both activated, said second damper element is in said non-blocking configuration and wherein said first and said second air flow control means are each configured such that, when only the ventilation air blower means is activated, said first damper element is in said non-blocking configuration and said second damper element is in said blocking configuration.