The Benefits and Purpose of Efficiency Modifications
A Word of Warning
Safety Tip
Rear Vent Blocking
Find Sheet Metal
Measuring the Rear Vent
Measuring and Cutting Off the Rear Vent Block
This part gets a little interesting, you need to think about how your grill hood or base works. This one is not a one size fits all mod. For example, on one grill, the hood hinged up nicely, so I was able to attach the sheet metal to the hood and when you closed the lid, the sheet metal presses itself against the base and seals off 80% of the vent. In this grill design the hood works differently. I will attach the sheet metal to the base of the grill and when the lid is closed, the lid will press up against the sheet metal sealing it off. You will have to study your grill and see how best to do it.
For this example, you see my measurement of 4″ will completely close off this vent (vertically). So we need a 21″ X 4″ piece of sheet metal. (Figure 104)
Measuring the Sheet Metal to Cut
Measuring the Sheet Metal to Cut
A Word of Warning
Shaping the Sheet Metal to Fit the Grill
Preparing the Sheet Metal to Attach to the Grill
In the next step, we will place 4 screw holes equal distances apart, so that the sheet metal can be securely fastened to the grill. See Figures 16 and 17.