We can recommend what is appropriate for your house/stove. According to current building regulations, a flue outlet must be located a minimum of 1.6 meters from a door or window.
For a stove or boiler stove you have the option of either going up an existing chimney with flexible flue liner, or constructing a twin walled rigid flue that can go through the external wall. It’s important to keep in mind the proximity to a window or door of the top of this outlet, because of the current building regulations. It may be necessary as a result to take this erected flue up past the eave of the house.