Combined Venting - State Water Heaters SANDBLASTER SBD30 150 Service Handbook
Self-cleaning induced draft multi flue commercial gas water heaters
Hide thumbs
Also See for SANDBLASTER SBD30 150:
- Specification sheet (2 pages) ,
- Specifications (2 pages)
Table of Contents
Advertisement
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
COMBINED VENTING
COMBINING VENTS (MANIFOLDING
When vents are combined, the area of the
combined vent should be equal to area of
the largest single vent, plus 50% of area of
all others joining.
EXAMPLE: To combine two 6" vents with
an 8" vent, the area of a combined vent
should be one half area of two 6 inch vents
(14 + 14) plus area of 8 inch vent (50)
or 78 sq. inches.
Referring to chart: 78 sq. inches requires
a 10" diameter vent.
Maximize height from water heater vent connection to first elbow or tee.
S
a t
e t
W
t a
r e
H
e
a
e t
A
s
h
a l
n
d
C
t i
, y
T
e
n
n
GAS WATER HEATER SERVICE HANDBOOK
s r
e
s s
e
e
©
2
0
0
7
Vent Size
Area in
Square
Inches
5"
6"
7"
38
8"
9"
1
9
T
Vent Size
20
10"
28
12"
14"
50
16"
64
18"
e
c
h
n
c i
l a
T
a r
n i
n i
g
D
Area in
Square
Inches
79
113
154
201
254
e
p
a
t r
m
e
t n
Hide quick links:
Advertisement
Table of Contents
