Published Thursday, September 20, 2012 12:51PM EDT
Last Updated Thursday, September 20, 2012 1:03PM EDT
Ottawaparamedics say 15 people suffered from headache, eye, nose and throat irritation after a possible problem with the building ventilation system at 900 Belfast Road in Ottawa.
Paramedics received the call at 10:40 a.m. Thursday morning. More than 75 people were evacuated from the building.
No one was sent to hospital.