Regulation .07 Gas-Fired Installations.

A burner in a gas-fired installation shall be tested and certified by the American Gas Association.

A gas-fired boiler shall have a vent or flue that terminates at an acceptable location outside the building.

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.