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Rheem 621548 - PROG40S-36N RH59 Professional Classic Atmospheric Water Heater, Natural Gas, 36K BTU, 40 Gallon, Short

Item: PROG40S36N-621548
MFR: 621548

This product is no longer available for purchase.

Comparable Products


Professional Classic™ Atmospheric Series

  • .58 - .62 EF
  • More hot water at a low operating cost

  • FHR: 50 to 90 gallons for natural gas
  • Recovery: 30.3 to 50.5 gallons at a 90 degree rise, based on model

Guardian System™ & Sensor
  • Exclusive air/fuel shut-off device
  • Maintenance free - no filter to clean

Low Emissions
  • Eco-friendly burner, low NOx design
  • Meets 40 ng/J NOx requirements

Longer Life
  • Rheem exclusive R-Tech (resistored) anode rod provides long-lasting tank protection

High Altitude Compliant
  • All models certified up to 6,000 ft. above sea level
  • Some models certified up to 10,200 ft. above sea level, check factory for listings

  • Easy to light - no matches required
  • EverKleen™ patented system fights sediment build-up
  • Enhanced-flow brass drain valve
  • Low lead compliant
  • Temperature and pressure relief valve included
  • Standard replacement parts

  • 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.


NameRheem 621548 - PROG40S-36N RH59 Professional Classic Atmospheric Water Heater, Natural Gas, 36K BTU, 40 Gallon, Short
Gemaire Item NumberPROG40S36N-621548
Manufacturer Product Number621548
SKU - PIM Number1404399737597
ERP Number350788
Unit of MeasureEA
Weight130.0 Pounds (Lb)
Length20.0 Inches (In)
Width20.0 Inches (In)
Height52.8 Inches (In)
Country of OriginMEX
BTU Input36000
Capacity Gallons40
Connection Size3/4"
Fuel TypeNatural Gas
Warranty OfferedYes
Energy Star RatedNo
UL ListedNo
Product FamilyPROG
GEM - Case Quantity


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