The Freon leak, discovered around 8:30 a.m., was traced to an HVAC unit on the roof, which "caused a smoke condition on the second floor," one responder said.
The building was ventilated and the all-clear was given to return shortly after 9 a.m.
No injuries were reported.
Fair Lawn police and firefighters were among the responders.
******
ALSO SEE: A battery on a piece of construction equipment in a Fair Lawn warehouse exploded Monday night, sending a worker flying, authorities said.
******
Click here to follow Daily Voice West Milford and receive free news updates.