AO Smith ProMax Plus High Efficiency Water Heaters

AO Smith ProMax Plus high efficiency residential gas water heaters qualify for most gas utility rebate programs, ENERGY STARĀ® Home Program recommendations and meet or exceed the Federal Energy Efficiency and/or Standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA90.1.

Manuals - AO Smith ProMax Plus High Efficiency Water Heaters


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  • 30 Gallon - 35,500 BTU ProMax Residential Gas Water Heater - Tall Model (Nat Gas) View Specs

    $569.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 30 Gallon - 32,000 BTU ProMax Residential Gas Water Heater - Tall Model (LP Gas) View Specs
    • SKU: GCR-30-LP
    • Brand: AO Smith

    $609.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 40,000 BTU ProMax Plus High Efficiency Residential Gas Water Heater - Tall Model (Nat Gas) View Specs

    $502.99 / each

    $979.90 / box
    2 x $489.95

    In Stock! (1 Available) Ships in 24-48 Hrs
  • 40 Gallon - 40,000 BTU ProMax Residential Gas Water Heater w/ Side-Mounted Taps - Tall Model (NG) View Specs

    $569.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 40,000 BTU ProMax Residential Gas Water Heater - Tall Model (Nat Gas) View Specs

    $559.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 36,000 BTU ProMax Plus High Efficiency Residential Gas Water Heater - Tall Model (LP Gas) View Specs
    • SKU: GCR-40-LP
    • Brand: AO Smith

    $599.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 40,000 BTU ProMax Plus High Efficiency Residential Gas Water Heater - Tall Model, Nat Gas (10 Yr Warranty) View Specs

    $669.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 36,000 BTU ProMax Plus High Efficiency Residential Gas Water Heater - Tall Model, LP Gas (10 Yr Warranty) View Specs

    $709.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 40,000 BTU ProMax Plus High Efficiency Residential Gas Water Heater - Short Model (Nat Gas) View Specs

    $539.95 / each

    $1,053.90 / box
    2 x $526.95

    In Stock! (1 Available) Ships in 24-48 Hrs
  • 40 Gallon - 40,000 BTU ProMax Residential Gas Water Heater - Short Model (Nat Gas) View Specs
    • SKU: GCRL-40
    • Brand: AO Smith

    $559.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 50 Gallon ProMax High Recovery 6 Yr Warranty Residential Water Heater w/ Side Connections (Nat Gas) View Specs

    $879.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 40,000 BTU ProMax Plus High Efficiency Residential Gas Water Heater - Short Model, Nat Gas (10 Yr Warranty) View Specs

    $689.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 36,000 BTU Residential Gas Water Heater - Short Model, Propane (10 Yr Warranty) View Specs
    • SKU: XCRL-40-LP
    • Brand: AO Smith

    $729.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 40 Gallon - 36,000 BTU ProMax Residential Gas Water Heater - Short Model (LP Gas) View Specs
    • SKU: GCRL-40-LP
    • Brand: AO Smith

    $599.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 50 Gallon - 40,000 BTU ProMax Residential Gas Water Heater - Tall Model (Nat Gas) View Specs

    $659.95 / each

    On Backorder Expected to Ship in 1-2 Months
  • 50 Gallon - 37,000 BTU ProMax Residential Gas Water Heater - Tall Model (LP Gas) View Specs
    • SKU: GCR-50-LP
    • Brand: AO Smith

    $699.95 / each

    On Backorder Expected to Ship in 1-2 Months