The SABER Grills built-in grill models R50SB0412 and R67SB0312 are designed and certified by CSA to be used in grill islands constructed of non-combustible materials.  For safety reasons, many grill manufacturers and certification agencies are making the decision to offer this style of built-in product only.  To be used in a grill island constructed of combustible materials, a grill liner insert would have to be used with the SABER built-in grill. SABER currently offers a three-burner (K50AA0918) and four-burner (K67AA0618) built-in liners for SABER built-in grills.