The Primo Oval XL requires 12 inches of clearance behind the grill to open properly. The depth of the Oval XL is 21.5 inches.
Important Notes: all dimensions are outside to outside measurements. These dimensions are for general purposes only. Due to the nature of kiln fired ceramics, these measurements should not be used for any application requiring detailed measurements. You should measure your actual Primo Grill prior to building any structure or cutting installation holes.