Rheem Professional Classic Series: Ultra Low NOx Specification Sheet

Rheem Water Heater Specification Sheet - Professional Classic Series: Ultra Low NOx.
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Professional 

Classic™ Ultra Low NOx gas water 

heaters are SCAQMD rule 1121 compliant 

with 10 ng/J NOx emissions

   In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.

Rheem Water Heating  •  101 Bell Road

Montgomery, Alabama 36117-4305  •  www.rheem.com 

Energy Factor based on D.O.E. (Department of Energy) test  procedures.

Efficiency
•  .60 - .63 EF
•  More hot water at a low operating 

cost

Performance
•  FHR: 53 - 91 gallons for natural gas 
•  Recovery: 30.3 to 40.4 GPH at a  

90° F rise, depending on model

Guardian System™ & Sensor
•  Exclusive air/fuel shut-off device for 

 double protection

•  Maintenance free – no filter to clean
•  Protective control system that 

disables the heater in the presence of 

flammable vapor accumulation

Low Emissions
•  Ultra Low NOx radiant  

burner design

•  Stainless steel construction
• SCAQMD Rule 1121 compliant
• Meets 10 ng/J NOx requirements
Self-Cleaning
•  EverKleen™ patented system fights 

 sediment build-up

• Reduces fuel costs
• Provides more hot water
Easy to Light
• No matches required  
Longer Life
•  Premium grade anode rod provides 

long-lasting tank protection

High Altitude Compliant
•  All models certified up to 5,999 ft. 

above sea level 

•  38-Gallon short model certified up to 

8,400 ft. above sea level

Plus…
•  Enhanced flow brass drain valve 
•  Temperature and pressure relief valve 

included

• Low lead compliant
• Exclusive Rheemglas® lining
Warranty
•  6-Year limited tank and parts 

 warranty*

•  With ProtectionPlus™ the 6-year limited 

tank warranty becomes 10-year

* See Residential Warranty Certificate for  

complete information

Units meet or exceed ANSI requirements and have 

been tested according to D.O.E. procedures. Units 

meet or exceed the energy efficiency requirements 

of NAECA, ASHRAE standard 90, ICC Code and all 

state energy efficiency performance criteria.

Professional 

Classic 

Ultra Low NOx 

28, 38, and 

48-Gallon Capacities

Up to 40,000 Btu/h

Natural Gas

    Water    

INTEGRATED HOME COMFORT

Residential Gas
Professional 

Classic 

Ultra Low NOx Water Heaters

E

G

B

A

C

F

H

HOT

WATER

CONNECTION

H

COLD

WATER

CONNECTION

D

1/2"

3/4" N.P.T.

RELIEF 

VALVE

OPENING

FLUE

ANODE ROD

 

 

 

DESCRIPTION 

FEATURES 

ROUGHING IN DIMENSIONS (SHOWN IN INCHES) 

ENERGY INFO.

  T 

 

 

 

 

 

 

 

 

HT. TO 

 

WATER 

HT. TO 

WATER 

 

 

  Y             

 

GAS INPUT IN 

 RECOVERY IN   FIRST HOUR 

HT. TO 

TANK 

 

GAS 

VENT 

CONN. 

SIDE T&P 

CONN. 

SHIP. 

 ENERGY

  P 

GAL.  MODEL 

THOUS. BTU/H  G.P.H. 90° RISE  DEL. G.P.H. 

VENT 

HT. 

DIAM. 

CONN. 

SIZE 

CNTR. 

VALVE 

SIZE WT. 

FACTOR

  E  CAP. NUMBER 

NAT. 

NAT. 

NAT. 

(LBS) 

NAT.

  Tall  28  PROG28-30U RH63 

30 

30.3 

53 

58-7/8 

56-1/8  16-1/2  17-1/2  3 or 4 

50-1/8 

3/4 

108 

0.63

  Tall  38  PROG38-38U RH62 

38 

38.4 

72 

60-1/2 

57-3/4 

19 

17-1/2  3 or 4 

51-3/4 

3/4 

132 

0.62

  Tall  48  PROG48-40U RH60 

40 

40.4 

91 

60-5/8 

57-7/8  20-1/2  17-1/2  3 or 4 

51-3/4 

3/4 

139 

0.60

 Short  38  PROG38S-36U RH62 

36 

36.4 

68 

51-7/8 

49-1/8 

21 

17-1/2  3 or 4 

43 

3/4 

127 

0.62

PRINTED IN U.S.A. 02/15 WP FORM NO. PROG RHULN N

INTEGRATED HOME COMFORT

INTEGRATED HOME COMFORT

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