Specification
    Water 
INTEGRATED HOME COMFORT
Commercial Gas
Universal Water Heaters
PRINTED IN U.S.A. 06/17 WP FORM NO. RR102C-1 Rev. 24
INTEGRATED  AIR  &  WATER
INTEGRATED HOME COMFORT
Features & Benefits
The tighter the commercial retrofit, 
the more you will appreciate how the 
Universal’s compact size and multiple 
water connections simplify installations. 
Choose from 80% thermal efficiency 
models that range from 98,000-399,900 
Btu/h and have maximum temperature 
setting of 180 degrees Fahrenheit.
Space Saver Design
The short heights and narrow jacket 
diameters, plus the top, front and rear 
water inlets/outlets offer the ultimate in 
installation flexibility.
System 
 Sentinel
™
 LED 
Diagnostic 
 System
Our exclusive 
 diagnostic   system, 
with glowing LED 
lights, verifies system 
 operation sequence by sequence. 
Patented Technology
Universal’s proprietary steel formulation, 
patented multi-flue design, combined 
with two coats of porcelain enamel, 
results in a superior heat exchanger 
design.
Stainless Steel Burners
Precision burners, raised port design, 
are formed from high chromium stain-
less steel. Each burner assembly slides 
out like a drawer for quick inspection 
and maintenance.
Low Profile Automatic 
Flue Damper
Low profile damper minimizes overall 
product height. Heavy duty vent hood 
supports are designed to withstand the 
rigors of installation.
Full-port, Full-flow Drain Valve
Factory installed brass drain valve 
allows for faster draining and servicing.
Direct Spark-to-Pilot 
Ignition System
Energy saving ignition that ignites pilot 
only when there is a call for heat.
Altitude Certifications
Up to 5,000 feet for natural gas and 
2,000 feet for LP; with high altitude 
certification kit, up to 8,000 feet.
Patented Anode Rods
Anode design utilizes multiple 
 magnesium rods to ensure corrosion 
resistance for a long tank life.
Warranty
3-Year limited tank warranty
See Commercial Warranty Certificate for  
complete information.
Efficiency | All models tested according to ANSI test 
procedures, and meet or exceed the thermal efficiency 
and standby loss requirements of ASHRAE standard 
(EPact). Also exceeds energy efficiency codes of all 
states including California Energy Commission (CEC).
Safety and Construction | Design certified by CSA: 
For operation at 180 degrees; meets all safety and 
construction requirement of ANSI Z21.10.3; as an 
automatic storage or instantaneous water heater; as 
an automatic circulating tank water heater; and for 
operation on combustible floors and in alcove instal
-
lations. Certified for 150 PSI maximum working 
pressure (160 PSI for ASME models).
Optional Construction | ASME construction is 
available on designated models. UL Sanitation (NSF5) 
compliant models are available when equipped with 
optional seal kit (Part No. AM35450).
Universal
™
 is a family of commercial gas
water heaters that are designed to fit into
tight retrofit applications
Rheem Universal
35 to 100-Gallon Capacities
98,000-399,900 Btu/h
Natural and LP Gas
Top-Front-Rear Inlet/Outlet
Water Connections
Continued on page 5
(On Selected
Models)
(With 
Optional Kit)





