Coupled to most ventilation fans, the collected, heated outside air enters the building, reducing energy costs for heating.
(heated outside air; enters; the building; T:Coupled to most ventilation fans) Context(heated outside air enters,List([49, 74))):(heated outside air; enters the building reducing; energy costs for heating)
heated outside air enters,List([49, 74))
heated outside air heated outside air
enters enters the building reducing
the building T:Coupled to most ventilation fans
energy costs for heating