DeDietrich C230 ECO-A 120 Installation, Operating And Service Manual page 35

C230 ECO-A
Vent terminals should avoid being installed where the building exterior
could be tarnished from the flue gases, a shield or another location
should be considered.
The vent terminals shall be installed according to the instructions as
provided. Terminals shall not be less than 2 inches [50 mm] from the
wall surface or more than 10 inches [254 mm] from the center line of
the terminal to the wall. For high traffic locations, the vent terminal
shall be guarded.
According to the national gas codes [CSA B149 & ANSI Z223.1/NFPA
54] a vent shall not terminate...

Directly above a paved walkway or driveway which serves two or
more buildings or where the flue gas condensation or vapor could
create a hazard or improper operation of regulators, relief's or
valves or any other device.

Above or below any electric or gas meter, regulators & relief
devices unless a 4 ft [1.2 m] horizontal clearance distance to be
maintained.

Less than 7 ft [2.1 m] above any paved sidewalk or driveway.

Less than 6f t [1.8 m] from any combustion air inlet source from
any nearby building.

Less than 4 ft [1.2 m] above a meter/regulator assembly
horizontally from a vertical centerline of the regulator vent outlet to
a maximum vertical distance of 15 ft [4.6 m].

Less than 1 ft [0.3 m] above grade or normal snow level in the
area is expected.

Less than 3 ft [0.9 m] from windows, doorways, and combustion
air supplies nearby buildings or other appliances.

Under a veranda, porch or deck, unless [1] the veranda, porch or
deck is fully open on at least 2 sides underneath. [2] The distance
between the top of the terminal and the grade is greater than 1 ft
[0.3 m]
7 Flue gas discharge and air supply
35