AGA XH9303 : 3ED

I. HISTORY OF VENTING AND VENTILATION
II. THE PURPOSE OF GAS APPLIANCE VENTING AND
     VENTILATION
III. BASIC THEORY OF VENTING SYSTEM OPERATION
     Motive Force in Vents
     Need to Remove Water Vapour
     Factors that Affect Venting System Design and
     Operation
IV. TYPES OF GAS VENTS
     Chimneys
     Type B Vents
     Type B-W Vents
     Type L Vents
     Single-Wall Metal Pipe Vents
     Plastic Pipe Vents
V. VENTING SYSTEMS
     Appliance Categorization
     Single Appliance Natural Draft Type Vent Systems
     Multiple Appliance Natural Draft Type Vent
     Systems
     Direct Vent Systems
     Special Venting Systems
       Power Venting
       Manifold Venting
       Multiple Venting Systems
       Multi-Story Vents
       Exhaust System Venting
     High-Efficiency Appliance Vents
VI. CODE REQUIREMENTS FOR VENTING
     Appliances Subject to Venting
     Equipment Not Required to be Vented (unvented
     appliances)
     Vent Materials
     Clearance Requirements
     Sizing Requirements
     Installation Standards
     Prohibited Installations
VII. VENT SIZING AND DESIGN
     Venting Into A Masonry Chimney
     Single Appliance Natural Draft Vent
     Multiple Appliance Vent Systems
     Multi-Story Vent Systems
     Power Venting
     Manifold Venting
     Direct Vent Systems
     Termination of Type B Vents
     Miscellaneous Design Specifications
       Effects of Joints and Turns
       Single-Wall Vents
       Outside Vents
       Vents in High Altitude Locations
VIII.AIR FOR COMBUSTION AND VENTILATION
     Confined Spaces
     Unconfined Spaces
IX. INSTALLATION OF VENTS
     Vents and Vent Fittings
     Vent Terminals (Vent Caps)
     Installing Vents and Vent Connectors
       Joint Connections
       Draft Hood Connections
       Support
     General Precautions
       Minimize Lateral Runs
       Avoid Internal Vent Obstructions
       Provide Proper Clearances
       Install Firestops
       Provide Adequate Air
       Do Not Run Vent Through Existing Ducts
       Protection of Vents
     Placing the Appliance Vent in Operation
       Check for Water Leaks
       Check Overall Appearance
       Check Air Supply
       Test for Proper Draft
       Direct Vent Systems
X. TROUBLESHOOTING
     Chronic Pilot Outage
     Condensation
     Leaking Flue Gases
     Rusting or Corrosion of Burners, Draft Hoods
     or Vent Pipes
     Spillage of Combustion Products
       Incorrectly Sized Vent System
       Incorrectly Sized Vent Cap
       Excessive Lateral Runs
       Too Many Elbows
       Improper Pitch to Lateral Runs
       Exhaust Systems or Furnace Blowers
       Improper Seal Between Furnace and Return Air
       Duct
       Restriction of the Vent System
       Wind Conditions at the Vent Cap
       Appliances Attached to Multiple Vent
     High-Efficiency Appliances
     Discoloration of Room Walls or Vent System
     Surface Salt Deposits Outside Masonry Chimneys
     Unvented Appliance Problems
       Condensation on Walls, Windows or Baseboards
       Carbon Deposits
XI. SIZING OF CATEGORY I VENTING SYSTEMS AND TABLESS
REFERENCE SOURCES
GLOSSARY