42 & 53 TANKLESS SERIES
Specifications
DESCRIPTION
FEATURES
ROUGHING IN DIMENSIONS (SHOWN IN INCHES)
ENERGY INFO.
GAS
WATER FLOW RATE
VENT
SHIP.
D.O.E. ANN.
MODEL
INPUT
TEMP.
GPM @ 77° GPM @ 45° GPM @ 35°
CONNECTION
DIAMETER
WEIGHT
ENERGY
OP. COST
NUMBER
BTU/HR.
TYPE
RANGE
RISE MAX. RISE MAX. RISE MAX.
WATER
GAS
HEIGHT
WIDTH
DEPTH
(INCHES)
(LBS.)
FACTOR
NAT/LP
RTG2-42PVN†
21,500 -
Indoor
100° to
2.5
4.2
5.5
3/4
3/4
20-1/2
13-3/4
6-1/4
3
35
.83
$220/$369
118,000
140° F
RTG-53PVN
21,500 -
Indoor
100° to
3.1
5.3
6.8
3/4
3/4
20-1/2
13-3/4
6-1/4
3
36
.82
$223/$374
145,000
140° F
RTG-53XN
19,000 -
Outdoor
100° to
3.0
5.3
6.8
3/4
3/4
20-1/2
13-3/4
6-1/4
N/A
36
.82
$223/$374
141,000
140° F
RTG-53DVN
20,000 -
Indoor
100° to
3.0
5.3
6.8
3/4
3/4
23
13-3/4
7-1/4
3 by 5
39
.82
$223/$374
141,000
Direct Vent
140° F
CONCENTRIC
RHEEM TANKLESS WATER HEATERS FOR 1-2 BATHROOM HOMES
All models are available in Natural Gas and Propane (LP).
For Propane replace the N with P when ordering.
* 135,000 for Propane model.
• Factory set maximum temperature is 120° F. See Use and Care Manual for setting.
• For installations above 3,280 feet, a high altitude chip is required. Refer to Rheem price list or consult
factory for details.
• Consult factory for information on sizing the application.
Installation Vent Kits available separately:
3" diameter for RTG2-42PV† and RTG-53PV models.
Vent Termination Kits are required for Direct Vent models. Contact your distributor for details.
Temperature Rise (°F)
Model Number
35°
45°
50°
60°
70°
77°
80°
90° 100°
RTG2-42† Water Flow (GPM)
5.5
4.2
3.8
3.2
2.7
2.5
2.4
2.1
1.9
RTG-53 Water Flow (GPM)
6.8
5.3
4.7
3.9
3.4
3.1
3.0
2.6
2.4
Above estimates are for sizing purposes only.
Proper gas pressure must be ensured to supply tankless gas water heaters – up to 118,000 BTU for
RTG2-42† models, and up to 145,000 BTU for RTG-53 models. (Consult your gas supplier)
Rheem Heating, Cooling & Water Heating
101 Bell Road • Montgomery, AL 36117-4305
1-866-720-2076 • www.rheemtankless.com
Rheem Canada Ltd./Ltée • Water Heater Division
128 Barton Street West, Hamilton, Ontario L8N 3P3
Rheem manufactures residential & commercial heating,
cooling & water heating products.
Printed in U.S.A.
07/08 WP
Form No. 101-50-53CAN
Energy Factor and Average Annual Operating Costs based on D.O.E.
(Department of Energy) test procedures. D.O.E. national average fuel rate
natural gas $1.218/therm; LP $1.87/gallon
.
These units are designed to meet or exceed ANSI (American National Standards Institute)
requirements and have been tested according to D.O.E. test procedures and meet or
exceed the energy efficiency requirements of NAECA, ASHRAE standard 90, ICC Code and
all state energy efficiency performance criteria for energy consuming appliances.
Before purchasing this appliance, read important energy cost and efficiency information
available from your supplier.
In keeping with its policy of continuous progress and product improvement,
Rheem reserves the right to make changes without notice.
Water Heater Flow Rate Curves
0
1
2
3
4
5
6
7
10
15
20
25
30
35
40
45
50
55
60
70
80
90
100
Delta-T
G
PM
53 Max Flow
42 Max Flow
®
† Limited availability in Canada.