Portfolio Volper Volper is a device that is installed on the chimney duct in order to prevent crosswind blowing and clogging, as well as to improve the draft in the system specifications:Steel grade: 201, 304Diametr (Ø): 100-400Steel thickness (mm): 0.5 Oval pipe oval chimney elements + Double-wall revision + Single-wall spark arrester (grid) single walled accessories + Basket under stones edge elements for saunas and fireplaces + Double wall pipe double wall elements double wall elements + Single wall pipe single wall elements +
