Rinnai Demand Duo CX Series Installation Instructions Manual page 20

Direct Vent
1
Figure 14: Direct Vent Termination Clearances (For Concentric and Twin Pipe)
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
SNOW
Table 5
Ref
A Clearance above grade, veranda, porch, deck, or balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit, located above the terminal
within a horizontal distance of 2 ft (61 cm) from the center line of the
D
terminal
E Clearance to unventilated soffit
F Clearance to outside corner
G Clearance to inside corner
Clearance to each side of center line extended above meter/regulator
H
assembly
I Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or the
J
combustion air inlet to any other appliance
K Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located on public
L
property
M Clearance under veranda, porch, deck, or balcony
Table 6
[1] A vent shall not terminate directly above a sidewalk or paved
driveway that is located between two single family dwellings and
serves both dwellings.
[2] Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor.
Demand Duo H-Series with SENSEI CX Installation Instructions
(Concentric Pipe and Twin Pipe)
Description
Clearance to opposite wall is 24 in. (60 cm).
Canadian Installations
(CSA B149.1)
Direct Vent (Indoor Unit)
12 in. (30 cm)
36 in. (91 cm)
*
*
*
*
*
*
Above a regulator within 3 ft
(91 cm) horizontally of the vertical
center line of the regulator vent
outlet to a maximum vertical
distance of 15 ft (4 m)
36 in. (91 cm)
6 ft (1.83 m)
7 ft (2.13 m) [1]
12 in. (30 cm) [2]

Clearances are in accordance with local installation codes and the
requirements of the gas supplier. (Dégagement conforme aux codes
d'installation locaux et aux exigences du foumisseur de gaz.)
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
U.S. Installations
(ANSI Z223.1 /NFPA 54)
Direct Vent (Indoor Unit)
12 in. (30 cm)
12 in. (30 cm)
*
*
*
*
*
*
*
12 in. (30 cm)
3 ft (91 cm) above if within
10 ft (3 m) horizontally
*
*
20