While built-in Blaze grills are a convenient choice because it allows you to use the available space to the maximum, you need to pay attention to leave enough clearance for the grill you are buying. According to the manufacturer's official recommendations, you will need five inches of clearance behind the unit. That is because you need enough room to open the lid when using the grill. Pay special attention if you plan to place the product close to a combustible wall. The company recommends leaving at least 16 inches from those walls to avoid a potential fire hazard.