Sterling gg120a1nsa11 Gas Unit Heater 120000 Btu/h

Product Description

The STERLING gg120a1nsa11 is a power-vented, gas-fired propeller unit heater rated at 120,000 BTU/h input with 82 percent thermal efficiency. It runs on natural gas at 115 volts and is built around a 20-gauge tubular aluminized steel heat exchanger designed for long service life in demanding environments. Single-stage gas control and direct spark ignition keep the operating sequence straightforward. The unit is sized for installations where ceiling or wall space is limited, making it a practical choice for licensed HVAC technicians and mechanical contractors working in light commercial or residential garage applications.

The gg120a1nsa11 is rated for elevations from 0 to 4,999 feet and carries ETL certification for residential garage use as a utility heater. It ships ready for standard power-vented operation and can be converted to separated combustion using the optional X7 accessory kit, giving installers flexibility when fresh combustion air supply is a concern. The low-profile cabinet design suits garages, workshops, and similar spaces where overhead clearance is limited. The open drip-proof motor is appropriate for environments where minor moisture exposure is expected.

Key Features

• 120,000 BTU/h input capacity at 82 percent thermal efficiency
• Single-orifice burner system with direct spark ignition for reliable light-off
• 20-gauge tubular aluminized steel heat exchanger with 10-year warranty
• 321 stainless steel burner box for corrosion resistance
• 20-gauge jacket panels with baked enamel finish
• Convertible to separated combustion with optional X7 accessory kit
• OSHA-compliant fan guard and terminal strip low-voltage wiring for code-compliant installation

Compatibility

ETL certified for use as a residential garage utility heater. Convertible to separated combustion using the STERLING X7 accessory kit. Rated for elevations from 0 to 4,999 feet on natural gas.

Installation Notes

Installation must be performed by a licensed HVAC or mechanical contractor in accordance with the manufacturer instructions, local mechanical codes, and applicable sections of the IFGC. Shut off the gas supply and disconnect electrical power before servicing. Verify the fuel type, supply pressure, and altitude rating are appropriate for the installation site before mounting. When converting to separated combustion, install the X7 accessory kit per the manufacturer instructions before commissioning.

Technical Specifications

• Input Capacity: 120,000 BTU/h
• Thermal Efficiency: 82 percent
• Fuel Type: Natural Gas
• Voltage: 115 volts
• Stages: 1
• Motor Type: ODP (Open Drip Proof)
• Ignition: Direct Spark
• Heat Exchanger Material: 20-gauge aluminized steel tubular
• Burner Box Material: 321 stainless steel
• Cabinet: 20-gauge steel with baked enamel finish
• Elevation Rating: 0 to 4,999 feet
• Venting: Power vented (separated combustion capable with X7 kit)
• Certification: ETL listed for residential garage utility heater use
• Heat Exchanger Warranty: 10 years

Standard Information

• Brand: STERLING
• Manufacturer Part Number: gg120a1nsa11