When I moved, I didn't realize how inadequate my ventilation system was in my new garage until I started getting heart palpitations while torching. Made me upgrade my system quickly!! I'm now using the hooded vent from Glasscraft. The only modification I did when installing was to replace the flexible vent hose with a rigid one. Works great and no more palpitations!
For those who balk at the cost... yes, it is over $300, but that is much cheaper than a trip to the ER!