Don't worry, be happy
This "smoker" is almost more of a steamer.
The bottom is filled with lava rocks, with the heating element snaking around.
You use about a double handful of wood chips. You soak them in water. You place them on the lava rocks, a few on the element to get a quick burst of smoke.
There is a huge bowl of water hanging under the bottom grill.
You place your meat on either grills.
You plug it in.
As the element warms up, and wood resting on it flares up. It heats the rocks and the water. The rocks heat the remaining wet wood. The wood evaporates off the water, and then slowly burns. I meant slowly. 90% of the wood is unburned when done.
The smoke mixes with the steams and swirls around. Sure, it all leaks out in the end, but it does not have a continuous stream of burning wood and smoke that a real smoker would. A small amount is concentrated in the smoker for an extended period.
I only started off with a double handful of wood, and I'm only combusting around 10%.
And yes, my garage is VERY drafty.
I'm safe.