Lochinvar gbn05050 50-gallon Direct Vent Natural Gas Water Heater

Product Description

The Lochinvar GBN05050 is a 50-gallon direct vent natural gas water heater built for residential indoor installation. It delivers reliable hot water performance with a first hour rating of 83 gallons, making it a strong choice for households with moderate to high daily hot water demand. The unit runs on natural gas and uses a pilot with piezo igniter for straightforward, dependable startup. With a Uniform Energy Factor of 0.65 and a maximum input of 47,000 BTUs, this water heater balances heating power with energy efficiency. The direct vent design pulls combustion air from outside and exhausts flue gases through a dedicated 5-inch flue, making it suitable for tightly sealed modern homes where indoor air quality and safety are priorities. The gas burner is engineered to reduce NOx emissions, meeting Low-NOx emission requirements. This is an important compliance factor for HVAC contractors and plumbers working in regions with strict air quality regulations. Water connections are located at the top of the unit and sized at 0.75 inches, a standard configuration that simplifies installation in most residential settings. The tank carries a nominal capacity of 50 gallons with a rated storage volume of 48 gallons. Both the tank and parts are covered by a 6-year limited warranty, giving contractors and homeowners confidence in long-term reliability. The GBN05050 is not ASME certified and does not include an insulating blanket. It ships in a carton measuring 73 inches tall, 31.5 inches long, and 23.5 inches wide. HVAC technicians and plumbers replacing aging residential water heaters will find the GBN05050 a dependable, code-compliant solution with solid output capacity and efficient combustion performance.

• 83-gallon first hour rating supports high daily hot water demand in residential applications
• Low-NOx gas burner meets strict emissions requirements for compliant installations
• Direct vent design with 5-inch flue allows safe indoor installation without relying on indoor combustion air

Product Highlights

The Lochinvar GBN05050 delivers 47,000 BTUs of natural gas heating power with a 0.65 Uniform Energy Factor and Low-NOx compliance, making it a reliable and regulation-friendly choice for residential water heating replacement projects.

Product Information

Standard Information

• Brand: LOCHINVAR
• Manufacturer Part Number: GBN05050

Technical Specifications

• Nominal Gallon Capacity: 50 Gallons
• Rated Storage Volume: 48 Gallons
• Uniform Energy Factor (UEF): 0.65
• Maximum BTUs: 47,000
• First Hour Rating: 83 Gallons
• Power Source: Gas
• Fuel Source: Natural Gas
• Ignition Type: Pilot with Piezo Igniter
• Flue Diameter: 5 inches
• Water Connection Location: Top
• Water Connection Size: 0.75 inches
• Height to TP Relief Valve: 53.25 inches
• Emissions: Low NOx
• Installation Type: Indoor
• Application: Residential
• TP Relief Valve Included: Yes
• Limited Tank Warranty: 6 Years
• Limited Parts Warranty: 6 Years
• Destination Country: US
• Shipping Height: 73 inches
• Shipping Length: 31.5 inches
• Shipping Width: 23.5 inches