Unit Heaters

Unit heaters are perfect for customers looking to add some warmth and comfort to their garage or workshop. 

Unit heaters are typically used in areas with high ceilings and are exposed in the space they are heating. Unit heaters can be installed for a low cost and are able to heat large volume areas without requiring extensive duct systems.

Reznor Unit Heaters (Low Clearance)

Reznor® unit heaters V3 series model UDAP is a gas-fired unit heater, available in 14 sizes ranging from 30,000 to 400,000 BTUH gas input.  Sizes 30-125 are approved for residential application, and all sizes are approved for commercial/industrial installations. Model UDAP unit heaters are designed for 82-83% thermal efficiency and are approved by the Canadian Standards Association (CSA).


  • Sizes 30-125 certified for residential heating application
  • Sizes 30-400 certified for commercial/industrial heating application
  • 82-83% thermal efficient ~ TOP in its class!
  • 50-60F rise range
  • NEW T-CORE2 design titanium stabilized aluminized steel heat exchanger (patent pending)
  • NEW T-CORE2 design single burner combustion system including a one-piece burner assembly (patent pending)
  • 115/1/60 supply voltage
  • 115 volt open fan motor with internal overload protection
  • Transformer for 24-volt controls
  • Integrated circuit board with diagnostic indicator lights
  • Fan relay (included on the circuit board)
  • Multi-try direct spark ignition with 100% lockout
  • Natural or propane single-stage gas valve (field adjustable for operation to 9,000 ft elevation)
  • Vibration/noise isolated fan and venter motors; designed for low noise operation
  • 2-pt and 4-pt suspension; standard on all sizes
  • External terminal strip for 24-volt wiring
  • External gas connection
  • Full fan guard; engineered for safety
  • Improved cabinet design with less visible hardware and a new Reznor appearance


Sterling (Garage Guy) Unit Heater (Low Clearance)

Garage Guy is an effective, safe solution for your heating needs. In just one visit a licensed professional can have the unit installed and working so that you can get back to everything you enjoy, even on the coldest of days.

Gas powered, the Garage Guy unit heater safely vents to the outside through an external flue and is so quiet the only thing you will notice is the warmth. A member of the Sterling family, the Garage Guy is backed by the same quality you've come to know and trust.


  • 81% Thermal Efficiency
  • Redundant Single Stage Gas Valve
  • Residential Certification
  • 20GA Aluminized Heat Exchanger
  • 120/24V Control Transformer
  • 115/1/60 Fan Motor with Internal Overload Protection
  • Power Vented
  • Direct Spark Ignition
  • 20GA Baked Enamel Cabinet
  • 10 Year Heat Exchanger Warranty
  • OSHA Fan Guard
  • Right Hand Control Access
  • High Limit Switch
  • Air Pressure Switch
  • Natural or Propane Gas
  • Gas Conversion Kit Included
  • Field Convertible to Separated Combustion
  • Easy Access Control Panel
  • 321 Stainless Steel Burner Box


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