
AGA XH9303 : 3ED
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
View Superseded by

FUNDAMENTALS OF GAS APPLIANCE VENTING AND VENTILATION
25-11-2024
12-01-2013
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
DocumentType |
Standard
|
PublisherName |
American Gas Association
|
Status |
Withdrawn
|
SupersededBy |
AGA XH0206 : 2002 | FUNDAMENTALS OF ELECTRICITY - COMBINED MANUAL & WORKBOOK |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.