Is this safe for my company to be asking of me?

The company I work for manufactures gas grills. My particular job is to test the burners in a test unit grill to make sure they burn ok. The factory is huge with very high ceilings, but they have no vent over my grill. I know that it's a generally accepted fact that it isn't safe to grill indoors, even in garages because of carbon monoxide build up. Most of the time I feel fine, but sometimes I feel fatigued and sometimes even a little dizzy. But it's hard for me to say if this is from the grill or me just needing some more sleep. So I was wondering if it's safe for me to be using a grill inside a giant factory? Would that be enough open air to keep the carbon monoxide from building up? Or should I be asking questions?