{"id":694281,"date":"2024-11-06T05:35:57","date_gmt":"2024-11-06T05:35:57","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ul-555s2020\/"},"modified":"2024-11-06T05:35:57","modified_gmt":"2024-11-06T05:35:57","slug":"ul-555s2020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ul\/ul-555s2020\/","title":{"rendered":"UL 555S:2020"},"content":{"rendered":"

1 Scope<\/b><\/p>\n

1.1 These requirements cover smoke dampers intended for use in heating, ventilating, and air conditioning (HVAC) systems. Smoke dampers are intended:<\/p>\n

    \n
  1. \n

    a)\u00a0To restrict the spread of smoke in HVAC systems that are designed to be automatically shut down in the event of a fire, or<\/p>\n<\/li>\n

  2. \n

    b)\u00a0To assist with the control of pressure differentials across smoke barriers when the HVAC system is part of an engineered smoke control system.<\/p>\n<\/li>\n<\/ol>\n

    \n

    1.2 Dampers covered by these requirements are evaluated for use as either:<\/p>\n

      \n
    1. \n

      a)\u00a0Smoke Dampers \u2013 For use in HVAC systems where ducts pass through smoke barriers.<\/p>\n<\/li>\n

    2. \n

      b)\u00a0Combination Fire and Smoke Dampers \u2013 For locations in HVAC systems where a fire damper and a smoke damper are required at a single location, or<\/p>\n<\/li>\n

    3. \n

      c)\u00a0Corridor Dampers \u2013 For locations in HVAC Systems where air ducts penetrate or terminate at openings in the ceilings of interior corridors when permitted by authority having jurisdiction.<\/p>\n<\/li>\n<\/ol>\n

      \n

      1.3 The smoke dampers covered by these requirements are intended for installation in accordance with the National Fire Protection Association Standard for Installation of Air Conditioning and Ventilating Systems, NFPA 90A, the International Mechanical Code and the Uniform Mechanical Code.<\/p>\n<\/p>\n

      \n

      1.4 Combination fire and smoke dampers and corridor dampers shall also comply with the applicable requirements in the Standard for Fire Dampers, UL 555<\/b>.<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

      Standard for Smoke Dampers<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      UL<\/b><\/a><\/td>\n2020-10-09<\/td>\n29<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":694291,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2680],"product_tag":[],"class_list":{"0":"post-694281","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ul","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/694281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/694291"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=694281"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=694281"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=694281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}