Code of Maryland Regulations (Last Updated: April 6, 2021) |
Title 09. Maryland Department of Labor |
Subtitle 12. DIVISION OF LABOR AND INDUSTRY |
Chapter 09.12.01. Board of Boiler Rules |
Sec. 09.12.01.07. Gas-Fired Installations
Latest version.
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A. A burner in a gas-fired installation shall be tested and certified by the American Gas Association.
B. A gas-fired boiler shall have a vent or flue that terminates at an acceptable location outside the building.
C. The size of the vent or flue shall be:
(1) That recommended by the boiler manufacturer;
(2) At least 4 inches in diameter or equivalent area; and
(3) If the horizontal run exceeds 10 feet, at least 6 inches in diameter or equivalent area.