
Sterling HVAC, the most recognized name in the game, has been producing American-made, industry-leading high-efficiency heating products for over 50 years. From a wide variety of Unit Heaters to engineered solutions including Rooftop and Indoor Make-Up Air Units, Sterling HVAC is a trusted choice relied on for residential, commercial, and industrial applications.
Garage Heaters

GG Series
Low Profile Unit Heater
Take back the garage for year-round use. GG Series gas-fired, low-profile garage unit heaters are both residential and commercial outbuilding certified (non-occupied spaces only) in seven configurations to suit every area. Quiet, thermostat-controlled and easily installed—they stay out of the way and let you keep working comfortably. Units are ready for standard or separate combustion all in one unit.
Standard Features
- 30 – 120 MBH
- 82% Thermal Efficiency
- Residential Certification: For Use as a Garage Utility Heater
- Standard or Separated Combustion All-In-One Units
- Single Orifice Burner System
- Direct Spark Ignition
- 20-Gauge Tubular Heat Exchangers
- 20-Gauge Jacket Panels with Baked Enamel Finish
- Power Vented
- OSHA Fan Guard
- Terminal Strip Low Voltage Wiring
- LP Gas Conversion Kit Included
- Easy Access Control Panel
- 321 Stainless Steel Burner Box
- 10-Year Heat Exchanger Warranty

XF Series
Commercial & Light Commercial Unit Heaters
The Sterling XF (propeller) and XC (blower) series convertible venting type tubular gas-fired unit heaters offer a highly efficient, extremely durable alternative to the traditional clam shell design. These propeller and blower type units combine the latest tubular heat exchanger and in-shot burner technology with the quality and reliability you have come to know from Sterling. Units are available in sizes 100 to 400 MBH and have been certified by ETL as providing 83% thermal (combustion) efficiency.
Standard Features
- 100 – 400 MBH
- 83% Thermal Efficiency
- Standard or Separated Combustion All-in-One Units
- 20-Gauge Aluminized Steel Tubular Heat Exchanger
- 83% Thermal Efficiency
- Direct Spark Ignition System
- Power Vented
- Redundant Single Stage Gas Valve
- Rear Burner Access for Ease of Service
- Individually Adjustable and Removable Horizontal Louvers
- 10-Year Heat Exchanger, Flue Collector and Burner Warranty