UL 2112
Outline of Investigation for Venting Systems for Use with Gas-Fired Direct Vent Appliances

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2009-06-03DOD Approved: --
Price Code:AANSI Approved: --
Type:outline

  • SCOPE

    1 Scope

    1.1 These requirements cover venting systems intended for venting direct vented gas-fired appliances that comply with ANSI Z21 series Standards. Venting systems covered by these requirements are intended to be used with direct vented gas-fired appliances that have been installed in accordance with the National Fuel Gas Code, NFPA 54 and with Codes such as the International Mechanical Code, International Residential Code, Uniform Mechanical Code, and local Codes.

    1.2 The requirements covered by this Outline are intended to address the structural integrity supporting means, rain effects, and corrosion effects of the venting system. For wind effects, leakage, and clearance to combustible construction the appliance standard requirements shall be applied.

    1.3 These requirements do not cover venting systems intended for use with Category II, III or IV appliances.

  • TABLE OF CONTENTS
    Expand All

    • Outline Title Page
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 Glossary
          • 4 Components
        • CONSTRUCTION
          • 5 Materials
          • 6 Assembly
          • 7 Joints
          • 8 Firestop Spacers
          • 9 Thimbles
          • 10 Support Assembly
          • 11 Radiation Shields
          • 12 Vent Termination Assembly
        • PERFORMANCE
          • 13 General
          • 14 Vertical Support Test
          • 15 Strength Tests
            • 15.1 Impact test
            • 15.2 Vent termination load test
            • 15.3 Longitudinal force test
            • 15.4 Load test for vent elbows
            • 15.5 Vent joint load test
          • 16 Wind Load Test
            • 16.1 Test on roof assemblies
            • 16.2 Test on lateral supports
          • 17 Rain Test
          • 18 Vent Sag Test for Horizontal Installations
          • 19 Joint Sealing Compound Test
          • 20 Test Conditions for Markings
            • 20.1 Air oven-aging test
            • 20.2 Humidity test
            • 20.3 Unusual-condition exposure test
        • MARKING
          • 21 General
          • 22 Permanency of Marking
        • INSTRUCTIONS
          • 23 Installation and Maintenance Instructions