The height of the pipe can vary depending on the shape of the roof, as well as on where the chimney is located (from the wind -up or leeward side). The material from which the chimney is produced should have resistance to aggressive chemical components. During operation, it will often be cleaned with various means, so the material should not be destroyed. Gas boilers often require a tee of condensation. If it can not be used for fireplaces or stoves, then for boilers it is required.
