Warranties 
Rebates 
Tax Credits 
Sustainability 
Careers 
Help 
Professional Classic Series Ultra Low NOx High BTU Models with Installed Side Water Connections
MODEL PROG48-48U RH EC1
- 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
- .58 - .64 UEF
- Side water connections for space heating applications available on select models
- EverKleen® patented system fights sediment build-up
Models
SKU PROG48-48U RH EC1
Warranty Years 6
Model Professional Classic Series Ultra Low NOx High BTU Models with Installed Side Water Connections
Tank Capacity 48
Fuel Natural Gas
Height 61.75"
UEF 0.63
High Efficiency Yes
LowNox Yes
Efficiency
- .58 - .64 UEF
- More hot water at a low operating cost
Performance
- FHR: 51 - 86 gallons for natural gas
- Recovery: 30 to 40 GPH at a 90° F rise, depending on mode
Guardian System™ & Sensor
- Exclusive fuel shut-off device
- 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
- Select models certified up to 10,000 ft. above sea level
Plus…
- NEW! Skinny models with smaller tank diameter 16 & 18" diameter
- NEW! Side water connections for space heating applications available on select models
- Enhanced flow brass drain valve
- Temperature and pressure relief valve included
- Factory installed temperature and pressure relief valve on select models
- 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
- 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
More Residential Rheem Products
Find additional documentation by viewing these related products.
Natural Gas
Propane Gas
Professional Prestige® Maximus Heavy Duty with LeakSenseCapacity 75-75
- .88 UEF reduces operating cost
- Highest Hot Water Delivery (FHR) of 198 gallons in MaxMode™
- Easy front access to connections and components
- LCD Display with built-in water leak sensor and system health
Propane Gas
Natural Gas
Professional Classic Plus® MaximusCapacity 40-50
- Up to .90 UEF reduces operating cost
- Recovery: Up to 64 GPH at a 90° F rise, depending on model
- Up to 95G first hour rating depending on model
- Built-in Condensate Neutralizer
Natural Gas
Professional Classic Series Ultra Low NOx Skinny ModelsCapacity 28-46
- .58 - .64 UEF
- Longer life
- SCAQMD Rule 1121 compliant
- 29, 39, 40, and 50 gallon capacities
Propane Gas
Natural Gas
Performance Platinum™ Maximus With LeakSenseCapacity 40-50
- Up to .90 UEF reduces operating cost
- Highest Hot Water Delivery (FHR) of 192 gallons in MaxMode
- Easy front access to connections and components
- LCD Display with built-in water leak sensor and system health
