What are the minimum clearance requirements for safe grill placement?

The grill requires a minimum clearance of 91 cm (36 inches) from both the sides and back of the unit to any combustible construction. Never use the grill in a garage, porch, shed, breezeway, or any other enclosed area — it is for outdoor use only. Additionally, never operate the grill within 10 feet of any structure or combustible material, or within 25 feet of any flammable liquid. (Pages 4, 6)