> Now you can throttle the air to the firepot and at the same time, the > excess draft is vented through the stem of the tee and the motor > doesn't load up and whine. Or you can blow the excess air across the mouth of the forge and maybe burn your knuckles less, not to mention your palms, when you grab a stick of steel that has gotten hot a foot away from the firebox... Air gates rock. Andy G.