Compact Low CFM Direct Fired Heater (R76)
Compact Low CFM Direct Fired Heater (R76)
Compact Low CFM Direct Fired Heater (R76)

Compact Low CFM Direct Fired Heater


The Direct Gas Fired Make-Up Air package is designed to deliver tempered make-up air for installations requiring frequent air changes. Units are designed for natural and propane gas applications, with a max BTU rate of 241,290, and are for indoor or outdoor installation.

Units are designed for natural or propane applications and are rated for indoor/outdoor installations in commercial occupancies. A unique feature is the self-adjusting burner profile plates allowing 2-speed and variable-air-volume applications. The plates ensure proper air velocity and pressure drop across the burner for clean combustion. Spring-loaded profile plates react to the momentum of the fresh air stream, and therefore, no motors or actuators are needed to drive them, nor do they need to be manually set to a specific position.

Standard features include an intermittent spark ignition system with timed safety lockout and redundant gas valves. Units consist of a galvanized enclosure with an elevated gas burner which burns directly in the air stream. The burner consists of non-clogging, stainless steel combustion baffles attached to an aluminum gas supply section. The burner is capable of nearly 100% efficiency with a maximum turndown ratio of 15 to 1. The products of combustion mix with the make-up air which is introduced into the heater intake directly from outside the building. The burner module has a standard horizontal inlet and discharge duct connection and is located upstream of the blower. The heater has a standard horizontal inlet designed to accommodate an outside air inlet hood with standard 2" filter and screen.

To satisfy a variety of installation requirements, packages are available in a number of configurations which include additions of filtered intake with easy access door and a trunkline that is used to move the air intake away from the grease laden exhaust air. Screened intakes are used to stop debris from being pulled in to the heater. The screened intake attaches directly to the filtered intake or the trunkline.

Combination packages that include both exhaust and supply fans mounted on a single roof curb are also available; please contact your sales representative for more information.

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  • Air Volume: 600 – 1,800 cfm
  • Maximum SP: 2" wg. @ standard air density
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  1. G90 galvanized construction
  2. Easy access doors
  3. Pre-wired, pre-piped controls
  4. Horizontal or down discharge
  5. Adjustable drive sheaves
  6. Fully insulated casing
  7. Stainless steel burner with aluminum casting
  8. 120 volt control transformer with single point electrical connection
  9. Redundant gas valves
  10. Intermittent spark pilot with timed safety lockout
  11. Electronic flame modulation
  12. High temperature limit switch
  13. Airflow proving switch
  14. Economizer inlet thermostat
  15. Motor starter
  16. Disconnect switch
  17. Burner observation port


  1. Propane fuel application
  2. Room override thermostat
  3. Motorized intake damper
  4. Remote control panel including summer/winter switch and operating lights
  5. Freeze stat with bypass timer
  6. Room modulating thermostat
  7. High gas pressure regulator
  8. Convenience outlet
  9. Screen intake
  10. Auxiliary starters
  11. Inlet gas pressure gauge
  12. Indoor hanging cradle
  13. VAV packages
  14. Roof curbs
  15. Extra set of V-belts
  16. DDC control capability for BACnet MS/TP, LonWorks, Johnson N2, and Modbus Protocol


The R76 Model has been certified by ITS. This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. and Canadian products safety standard, that the manufacturing site has been audited, and that the applicant has agreed to a program of periodic factory follow-up inspections to verify continued performance.

Model R76 is ETL Listed under file number 103371695COL-001 and complies with ANSI Z83.4-Second Edition and CSA 3.7-2006 Standards.



  1. R76 Low CFM Direct Fired Heater. Belt Drive.
  2. R76D Low CFM Direct Fired Heater. Direct Drive.
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