Twin wall flue system design, measuring the eaves or gutter offset

If your eaves or guttering protrude from the side of the house then the flue pipe has to move sideways to avoid this obstruction. We will use bends and lengths to move the flue sideways and will need to know how far the flue has to move horizontally.

Please tell us how far your eaves or gutter protrude from the side of your house as shown in the picture.