I second that Longhorn.
I cannot stress enough. Safety First!!!!
I pour in my basement but I also have engineered a vacuum hood that goes out a window, with an inline booster fan. Currently it blows at 180 CFM and turns the air over in my area 6 times and hour. I'm going to upgrade the fan though to a 350 CFM fan to make it turn the air over 10-12 times an hour. Ideally I'd like to turn it over once every 1-3 minutes to minimize any fumes escaping.
I also just got some fully enclosed goggles (like used in a science lab... $10 at Home Depot) this past weekend and wore it instead of just the regular safety glasses I use and man what difference did that make!
Funny how much my workshop has been upgraded safety wise since the birth of my little one.
Whether it be fumes, heat, or whatever... you only get one go round at this and it shouldn't be taken lightly.