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Residential Products
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HomeProductsResidentialWater HeatersPerformance Plus® Maximus

Performance Plus® Maximus

MODEL XG40T09UHN50UO
9-Year limited tank and parts warranty
  • Up to .90 UEF reduces operating cost
  • Recovery: Up to 64 GPH at a 90° Frise, depending on model
  • Up to 95G first hour rating depending on model
  • Built-in Condensate Neutralizer
Select Capacity
40
Gallons
50
Gallons

SKU XG40T09UHN50UO
Warranty Years 9
Model Performance Plus® Maximus
Tank Capacity 40
Fuel Natural Gas
UEF
0.9

Efficiency

  • Up to .90 UEF reduces operating cost
  • ENERGY STAR® rated

Performance

  • Up to 95G first hour rating depending on model
  • Recovery: Up to 64 GPH at a 90° Frise, depending on model

Easy Installation

  • Built-in Condensate Neutralizer
  • Certified for multiple termination configurations
  • Easy front access to connections and components
  • Zero clearance on sides and back
  • Longest vent runs, installs as PV orPDV with same unit
  • 8" Centers on top water connections for easy replacement of standard gas water heaters
  • 1/2" NPT gas connection
  • 3/4" NPT water inlet and outlet;3/4" condensate drain connections
  • Side water connections for space heating applications 
  • Temperature and pressure relief valve installed 

Integration

  • Easy to use LCD display with integrated diagnostics

High Altitude Compliant

  • Certified to 10,100 ft. above sea level– High altitude dongle installation required for over 2000 feet

Plus…

  • Dual anode rods extend tank life
  • Enhanced flow brass drain valve for faster draining
  • Start-up Verification for better diagnostics, faster installation and easier servicing

Warranty

  • 9-Year limited tank and parts warranty

9-Year limited tank and parts warranty

More Residential Rheem Products

Find additional documentation by viewing these related products.

Natural Gas
Propane Gas
Professional Prestige® Maximus Heavy Duty with LeakSense
Capacity 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® Maximus
Capacity 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 Models
Capacity 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 LeakSense
Capacity 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