Maytag HRN31250P User Manual
Page 22
22
40 AND 50 GALLON 40,000 BTU/HR MODELS
See Chart below for maximum length.
FIGURE 39.
•
The total vertical and horizontal vent run cannot exceed the
maximum length with the number of 90
o
elbows as specified
in the following tables. If more are required the venting
distance must be reduced 5 feet for every 90
o
elbow.
75 GALLON 70,000 AND 75,000 BTU/HR MODELS ONLY
3” DIA. VENT
NUMBER OF
MAX. LENGTH (FT.)
90
o
ELBOWS*
70
1
65
2
60
3
55
4
50
5
45
6
75 GALLON 70,000 AND 75,000 BTU/HR MODELS ONLY -
OPTIONAL 4” VENT PIPING
4” DIA. VENT
NUMBER OF
MAX. LENGTH (FT.)
90
o
ELBOWS*
110
1
105
2
100
3
95
4
90
5
85
6
ALL 40 AND 50 GALLON 40,000 BTH/HR MODELS ONLY
3” DIA. VENT
NUMBER OF
MAX. LENGTH (FT.)
90
o
ELBOWS*
115
1
110
2
105
3
100
4
95
5
90
6
ALL 40 AND 50 GALLON 40,000 BTH/HR MODELS ONLY -
OPTIONAL 2” VENT PIPING
2” DIA. VENT
NUMBER OF
MAX. LENGTH (FT.)
90
o
ELBOWS*
50
1
45
2
40
3
35
4
30
5
25
6
* Two 45
o
elbows are equivalent to one 90
o
elbow.
One 90
o
elbow equals 5 feet of equivalent vent length.
FIGURE 40.
•
Minimum vent length for all 40,000 BTU/HR input models is
4 feet and 16 inches for all other models.
VENTING THROUGH AN OUTSIDE WALL WITH LOW GROUND
CLEARANCE
•
When the venting piping cannot pass through an outside
wall at a height greater than or equal to 12” above the ground
(or above snow accumulation level), then the installation
can be modified as shown below.
FIGURE 41.
•
Refer to the tables on page 23 for maximum vent lengths for
low ground clearance installations. All installations assume
the use of two additional 90 elbows and the standard 45
o
vent cap with screen outside of the exterior wall.