ROCKWOOL options also act to lower thermal transmission. This could enable minimise Vitality use required to warmth or great properties – enhancing Vitality effectiveness. “Total procedure” Together with the one zero five kg/m³ mineral wool insulation, Flamebar BW18 offers the whole fire resistant duct solution. “Easy to fix” Flamebar BW18 https://fireresistantductworthisn80012.bloggactivo.com/35738690/ductworth-installation-an-overview