美利体育登录入口官网:EN 14989-1:2007
烟囱.密封房间加热用金属烟囱和独立材料暖风供气管的要求和试验方法.第1部分:C6型设施用垂直送空气/燃气风道
Chimneys - Requirements and test methods for metal chimneys and material independent air supply ducts for roomsealed heating applications - Part 1: Vertical air/flue terminals for C6-type appliances