What distance needed at rear of burner to tiled wall

Thanks for your enquiry.

For tiles on a non-combustible surface for example, tiles fixed directly to brick, stone, concrete, or cement board you'll need a minimum 100mm clearance behind the stove. If your tiles are on (or over) a combustible surface like timber stud with standard plasterboard this needs to be treated as a combustible surface and 350mm minimum rear clearance is required.