ProMax® Ultra-Low NOx High Recovery 74-Gallon Gas Water Heater

ProMax® Ultra-Low NOx High Recovery 74-Gallon Gas Water Heater

Model GCBN-75

The ProMax® Ultra-Low NOx High Recovery gas water heater is equipped with a pre-wired, factory-mounted blower which provides more efficient control of heat and helps ensure an adequate supply of make-up air.

Featuring a 74-gallon tank and a 75,100 BTU gas burner, the GCBN-75 standard vent delivers a thermal efficiency of 80%, and a recovery rate of 81 gallons per hour. It carries a 6-year limited warranty, and meets Ultra-Low NOx emission requirements.

Where to Buy

Where to Buy

Seattle, WA 98109

Location #1

Robison Plumbing Service Inc.

Bremerton, WA

More Info >>
Location #2

A Quality Plumber Inc.

Everett, WA

More Info >>
Location #3

Green House Plumbing & Heating

Bellevue, WA

More Info >>
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Product Features & Options

Intelli-Vent™ Gas Control

Advanced electronics for more precise control of water temperature and easy to understand system diagnostics.

Rated as Category 1 Appliance

May be common vented with other Category 1 appliances, vent connects directly to blower outlet.

T&P Relief Valve

Top-mounted T&P relief valve available as an option.

How it Works

Gas water heaters heat water by burning either natural gas or LP (propane). Gas water heaters need a source of air and also need to be vented properly. Cold water enters the water heater through an internal “dip tube” which forces the cold water to the bottom of the tank and pushes hot water out through the outlet connection. This arrangement provides the most hot water for a given tank size. Most gas water heaters use a pilot light. The pilot light on some models also generates the power needed to operate an electronic gas valve. When cold water enters the tank, the temperature sensor on the gas control tells the main gas valve to open. Gas flows to the burner where it is lit by the pilot light. The air needed by the burner is supplied by the room where the water heater is installed. The exhaust gases are vented to the outside. When the proper temperature is reached, the main gas valve shuts off. Because water can corrode the steel tank, we glass line the inside of the tank and install an anode rod to help reduce corrosion. The temperature and pressure relief valve is a safety device designed to open if the internal temperature or pressure of the tank exceeds certain limits. Water heaters should be large enough to provide adequate hot water even when temperatures are cold and household demand is greatest.




limited warranty


thermal efficiency

UL Listed means that the product met UL's safety requirements
CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
AHRI Air-Conditioning, Heating and Refrigeration Institute
ASME American Society of Mechanical Engineers

Product Specifications

Tech Specs
Gallon Capacity: 74
Recovery Gallons: 81
Maximum BTUs: 75,100
Standby Loss BTUs per Hour: 1040
Power Source: Natural Gas
Thermal Efficiency: 80%
Limited Tank Warranty: 6 Years
Limited Parts Warranty: 6 Years
Anode: Coregard™ Magnesium Anode
Anode 2: Coregard™ Magnesium Anode
T&P Relief Valve: Yes
Pilot Reset Button: Yes
Ignition Type: Electronic
Water Connection Location: Top
Water Connection Size: 3/4"
Emissions: Ultra-Low NOx
Dimensions & Venting
Type: Tall
Height: 57 7/8"
Height w/Draft Hood: 65 7/8"
Diameter: 25 1/4"
Width: 25 1/4"
Depth: 25 1/4"
Shipping Weight: 300lbs/136kg
Vent Type: Standard Vent


Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Often, these standards are tied to the ENERGY STAR® program.

Cash for Appliances is designed to encourage the purchase of energy efficient appliances. Consumers who purchase ENERGY STAR® or CEE qualified appliances can receive cash rebates. Most states are offering rebates in the $50 to $250 range.


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Need More Hot Water?

There's no reason to run out of hot water. If you're not sure that the GCBN-75 provides enough hot water for your needs, consider these:


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Vertex™ Power Vent 50-Gallon Gas Water Heater

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