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42 & 53 TANKLESS SERIES
Specifications
D
ESCRIPTION FEATURES ROUGHING IN DIMENSIONS (SHOWN IN INCHES) ENERGY INFO.
GAS WATER FLOW RATE VENT SHIP. D.O.E. ANN.
M
ODEL INPUT TEMP.
G
PM @ 77° GPM @ 45° GPM @ 35°
C
ONNECTION 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
DirectVent
140° F
CONCENTRIC
R
HEEM 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.
*
135,000for Propanemodel.
• Factory set maximumtemperature is 120° F.See Use and Care Manualfor 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.
InstallationVent Kits available separately: 3" diameter forRTG2-42PV† and RTG-53PV models.
VentTermination Kits are required for DirectVent 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 andAverage AnnualOperatingCosts based on D.O.E.
(Departmentof Energy) testprocedures.D.O.E.national average fuel rate
naturalgas $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
GPM
53 Max Flow
42 Max Flow
®
† Limited availability in Canada.