09/04
30484 Rev Q
19
MAXUS DIRECT VENT HEATER
Dimension Descriptions
A
Clearance above the ground, a veranda, porch, deck or balcony - 12 in. (30 cm) minimum. *
B
Clearance to window or door that may be opened – 10,000 BTUs or less, 6 in. (15 cm) minimum; 10,000-50,000 BTUs, 9 in.
(23 cm) minimum; over 50,000 BTUs, 12 in. (30 cm) minimum. *
C
Clearance to permanently closed window – 12 in. (30 cm) minimum - recommended to prevent condensation on window.
D
Vertical clearance to ventilated soffit located above the termination within a horizontal distance of 2 ft (60 cm) from the
centerline of the termination – 18 in. (46 cm) minimum. **
E
Vertical clearance to unventilated soffit - 12 in. (30 cm) minimum. **
F
Clearance to outside corner - 6 in. (15 cm) minimum.
G
Clearance to inside corner - 6 in. (15 cm) minimum.
H
Not to be installed above a meter/regulator assembly within 3 ft (90 cm) horizontally* from the center line of the regulator
(Canada only)
I
Clearance to service regulator vent outlet – 3 ft (.91 m) U.S. minimum and 6 ft (1.8 m) Canada minimum. *
J
Clearance to non-mechanical air supply inlet into building or the combustion air inlet to any other appliance – 9 in. (23 cm) U.S.
minimum and 12 in. (30 cm) Canada minimum. *
K
Clearance to mechanical air supply inlet - 3 ft (.91 m) U.S. minimum and 6 ft (1.8 m) Canada minimum. *
L
Clearance above a paved sidewalk or paved driveway located on public property - 7 ft (2.1 m) minimum.
A vent may not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings
and serves both dwellings.
M
Clearance under veranda, porch, deck or balcony - 12 in. (30 cm) minimum. * Recommended 30 in. (76 cm) for vinyl or plastic.
Only permitted if veranda, porch, deck or balcony is fully open on a minimum of 2 sides beneath the floor. *
N
Vertical clearance between two horizontal termination caps – 12 in. (30 cm) minimum.
O
Horizontal clearance between two horizontal termination caps – 12 in. (30 cm) minimum.
P
6 in. - Non-vinyl sidewalls
12 in. – Vinyl sidewalls
Q
18 in. – Non-vinyl soffit and overhang
42 in. – Vinyl soffit and overhang
R
8 ft.
T
M AX
1 cap
2 x S actual
2 caps
1 x S actual
3 caps
2/3 x S actual
4 caps
½ x S actual
12 ft
S
MIN
= # termination caps x 3
T
MAX
= (2/# termination caps) x S (actual)
S
M IN
3 ft
6 ft
9 ft
U
6 in. min. – Clearance from sides of electrical service.
W
12 in. min. – Clearance above electrical service.
*
As specified in
CGA B149 Installation Codes
Note:
Local codes or regulations may require different clearances.
**
Clearance required to vinyl soffit material – 30 in. (76 cm) minimum.
Note:
Location of the vent termination must not interfere with access to the electrical service.
WARNING!
In the U.S.:
Vent system termination is NOT permitted in screened porches. You must follow side wall, overhang and ground
clearances as stated in the instructions.
In Canada:
Vent system termination is NOT permitted in screened porches. Vent system termination is permitted in porch areas
with two or more sides open. You must follow all side wall, overhang and ground clearances as stated in the instructions.
Hearth & Home Technologies assumes no responsibility for the improper performance of the appliance when the venting
system does not meet these requirements.