SpokaneMan, I cooked a 14/lb. turkey with a patio temp of 20-25...no wind. I set the daisey wheel fully open. The input air duct was approx 1/8 inch.These settings maintained a temp of 225-250The dome temp read 100 degrees higher than grid. The polder in the breast supplied the readings. I also lay a horizontal thermometer on the grid as a check.The benefit of the bge is that the cermaic mass causes it to cook by "surround heat", whereas metal cooker cool off quickly in the area above the products. Some cookers cover the metal cookers with a blanket to increase the dome/chamber temp above the product.