Spec Sheet
NATURAL GAS AND LIQUID PROPANE GAS
Model
Number
Capacity
Combi2
®
TTW
®
Models
72 76,000 68 26 3 31530
7
⁄8 60
1
⁄453 64
1
⁄4 311553
F
Floor to
Exchanger
Inlet
in.
G
Floor to
Exchanger
Outlet
in.
H
Floor
to
Heater
Top
in.
K
Depth
in.
J
Floor
to
Water
Conn.
in.
Approx.
Shipping
Weight
lbs.
E
Floor
to
Gas
Conn.
in.
A
Floor to
Vent
Conn.
in.
D
Floor to
T&P
Conn.
in.
C
Vent
Size
in.
B
Jacket
Dia.
in.
Gal.
U.S.
Input
Nat.
BTU/Hr.
82
Input
LP
BTU/Hr.
GPH
Nat.
U.S.
Recovery
90°F Rise*
75,500
Model
Number
Capacity
Liters
272 22.3 306
F
Floor to
Exchanger
Inlet
mm.
G
Floor to
Exchanger
Outlet
mm.
H
Floor
to
Heater
Top
mm.
K
Depth
mm.
J
Floor
to
Water
Conn.
mm.
Approx.
Shipping
Weight
kg.
E
Floor
to
Gas
Conn.
mm.
A
Floor to
Vent
Conn.
mm.
D
Floor to
T&P
Conn.
mm.
C
Vent
Size
mm.
B
Jacket
Dia.
mm.
Input
Nat.
kW
22.1
Input
LP
kW
Hour
Nat.
Liters/
Hour
LP
Liters/
310
Recovery
50°C Rise*
1737 660 76 1346 389 784 1549 1530 1632 787 143
Meet or exceed ASHRAE 90.1b (current standard) C.E.C. Listed
80% Recovery Efficiency
45
61
Gal.
Imp.
38 67,000 60,000 65 22
7
⁄8
3
⁄8
3 24528 56
3
⁄850
1
⁄8 26
3
⁄460
3
⁄411
3
⁄450
1
⁄872
81
GPH
LP
U.S.
65
69
GPH
Nat.
Imp.
60
67
GPH
LP
Imp.
54
C-DW2- TW50T10FBN
C-DW2- TW75T10BN
C-DW2- TW50T10FBN
C-DW2- TW75T10BN
170 246 1673 559 1273 298 711 1273 1432 1543 679 1117617.519.6 272
Residential Power Vent Combi2
®
TTW
®
Gas Water Heater System
General
All gas water heaters are certified at 300 PSI test pressure (2068 kPa) and 150 PSI working pressure (1034 kPa). All potable water and heat exchanger
connections are 3⁄4" (19mm) NPT on 11" (279mm) centers. All gas connections 1⁄2" (13mm). All models design certified by CSA International (formerly AGA/
CGA), ANSI Z21.10.1 and or 10.3 and peak performance rated.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Suitable for Water (Potable) Heating and Space Heating.
Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into the potable water side. The potable side of this unit may NEVER
be connected to any existing heating system or component(s) previously used with a non-potable water heating appliance. The heat exchanger side of the
unit may be used in space heating applications.
Propane models feature a Titanium Stainless Steel propane burner. For Propane (LP) models change suffix “BN” to “SX”.
* Based on manufacturers rated recovery efficiency.
110 VAC Required for Power Venting / 110 VAC, 60Hz., 3.1 Amperes.
Subtract 5ft. (1.5m) for each additional
90° elbow.
† For high altitude installations, consult
the installation instructions.
** C-DW2-TW75T maximum 3" (76mm)
vent length is 50ft. (15m).
3"
Vent Pipe
4"
Vent Pipe
C-DW2-TW50T
C-DW2-TW75T
†
60 ft.**
7 ft.
55 ft.
50 ft.
45 ft.
†
180 ft.
15 ft.
175 ft.
170 ft.
165 ft.
76mm
Vent Pipe
102mm
Vent Pipe
†
18 m.**
2 m.
17 m.
15 m.
14 m.
†
55 m.
5 m.
53 m.
52 m.
50 m.
Max. Equivalent Length
Min. Equivalent Length
Number 1
of 2
90° Elbows 3
K
C
A
J
H
E
F
D & G
B
K
C
A
J
H
E
F
D & G
B
Heat Exchanger
Head Loss
GPM
2
5
8
10
12
Ft. of
Hd. Loss
0.15
0.94
2.40
3.75
5.40
Heat Exchanger
Head Loss
LPM
7.6
18.9
30.2
37.9
45.4
m of
Hd. Loss
0.0457
0.2865
0.7315
1.1430
1.6459
* These values were obtained using 180°F stored tank temperature.
Net Output is the space heating capacity based on normal piping and
pickup allowance of 15%.
Actual values may vary based on circulator flow rate, number of zones,
water and space heating demands.
Numbers subject to change.
©2022, Bradford White Corporation, USA. All rights reserved.
Printed in U.S.A.
Customer Service / Sales: 1-866-690-0961 / 905-203-0600
24/7 Technical Support: 800-334-3393
n
Email techserv
@
bradfordwhite.com
C547-G-0222 CANADA
Heat Exchanger Values*
Supply Temperature
Return Temperature
Differential
Flow Rate
Net Output
140°F
120°F
20°F
2.3 GPM
20,000 BTU/Hr.
60°C
49°C
11°C
8.7 LPM
6.0kW
120°F
100°F
20°F
3.4 GPM
29,000 BTU/Hr.
49°C
38°C
11°C
12.8 LPM
8.5kW
100°F
80°F
20°F
4.4 GPM
38,000 BTU/Hr.
38°C
27°C
11°C
16.6 LPM
11.1kW