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Modular Indirect Fired Bent Tube Heater

(R-IBT)

The Modular Indirect Fired Bent Tube Heater is designed to deliver clean air into an indoor environment. Units are designed for indoor or outdoor installation, and can use either Natural or LP gas. The push-through design ensures that combustion fumes will not enter the fresh air stream.

Every unit is programmed to start in high fire mode to ensure consistent light-off and is equipped with an electronic, Vernier-type fully-modulating control system. The duct furnaces are all type-409 stainless steel, and certified by the American Gas Association and approved by the Canadian Gas Association. Each model utilizes at least one, but not more than two, modulating stage(s) and between zero and two additional ON/OFF stages depending on the required heat output. In addition, the speed of its power-vent blower on the modulating furnace(s) is varied as the gas flow changes; thereby maintaining a constant 80% combustion efficiency over the entire gas-firing range of the unit.

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: 800 – 13,000 cfm
  • Maximum SP: 3" wg. @ standard air density
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Features

  1. Bent tube in-shot style furnace with type 409 stainless steel heat exchanger
  2. 80% constant efficiency over entire gas firing range
  3. 6:1 turndown per furnace, 28:1 max
  4. Full electronic Vernier-type modulation
  5. Forced high fire start
  6. Variable speed power-vent motor
  7. Discharge, space or Building Automation System (BAS) temperature control
  8. Isolated and insulated electrical controls vestibule
  9. Natural gas or liquid propane applications
  10. Inlet and manifold gas pressure indicating gauges
  11. Electronic push button adjustment for the modulating gas valve
  12. High temperature limit switch
  13. Flame rollout switch with manual reset
  14. LED indicators for troubleshooting
  15. Economizer inlet air thermostat
  16. Advanced Human Machine Interface (HMI) controls

Options

  1. 5:1 turndown for propane (LP) per furnace. 23:1 max
  2. Up discharge
  3. Motorized intake damper
  4. Remote control panel
  5. High and low gas pressure switch
  6. Mixing box
  7. Variable air volume (VAV) controls
  8. Double wall construction
  9. Blower on delay (heat exchanger pre-heat)
  10. Freeze-stat option
  11. Fire-stat option
  12. Convenience outlet
  13. Extended drop
  14. Single point electrical connection
  15. Control cabinet heater
  16. Dirty filter airflow switch
  17. Auxiliary starters
  18. Roof curbs
  19. Indoor hanging cradle
  20. DDC control capability for BACnet MS/TP, LonWorks, Johnson N2, and Modbus Protocol

Certifications

The R-IBT 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. 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 R-IBT is ETL Listed under file number 3137380COL-002 and complies with ANSI Z83.8-2006 and CSA 2.6-2006 Standards.

Resources

Models

  1. R1-IBT-150-G10 Indirect Bent Tube Gas Fired Heater with 10" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  2. R1-IBT-150-G10D Direct Drive Indirect Bent Tube Gas Fired Heater with 10" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  3. R1-IBT-200-G10 Indirect Bent Tube Gas Fired Heater with 10" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  4. R1-IBT-200-G10D Direct Drive Indirect Bent Tube Gas Fired Heater with 10" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  5. R1-IBT-300-150-150-G10 Indirect Bent Tube Gas Fired Heater with 10" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  6. R1-IBT-300-150-150-G10D Direct Drive Indirect Bent Tube Gas Fired Heater with 10" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  7. R1-IBT-400-200-200-G10 Indirect Bent Tube Gas Fired Heater with 10" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  8. R1-IBT-400-200-200-G10D Direct Drive Indirect Bent Tube Gas Fired Heater with 10" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  9. R2-IBT-200-G15 Indirect Bent Tube Gas Fired Heater with 15" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  10. R2-IBT-300-G15 Indirect Bent Tube Gas Fired Heater with 15" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  11. R2-IBT-400-200-200-G15 Indirect Bent Tube Gas Fired Heater with 15" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  12. R2-IBT-400-G15 Indirect Bent Tube Gas Fired Heater with 15" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  13. R2-IBT-600-300-300-G15 Indirect Bent Tube Gas Fired Heater with 15" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  14. R2-IBT-800-400-400-G15 Indirect Bent Tube Gas Fired Heater with 15" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  15. R3-IBT-400-G18 Indirect Bent Tube Gas Fired Heater with 18" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burner and Heat Exchanger.
  16. R3-IBT-600-300-300-G18 Indirect Bent Tube Gas Fired Heater with 18" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  17. R3-IBT-800-400-400-G18 Indirect Bent Tube Gas Fired Heater with 18" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  18. R3-IBT-1000-300-300-400-G18 Indirect Bent Tube Gas Fired Heater with 18" Blower, 3 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 20:1 Max Turndown for NG, (16:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  19. R3-IBT-1200-400-400-400-G18 Indirect Bent Tube Gas Fired Heater with 18" Blower, 3 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 18:1 Max Turndown for NG, (15:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  20. R4-IBT-400-920 Indirect Bent Tube Gas Fired Heater with 20" Blower, 1 Furnace1, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  21. R4-IBT-800-400-400-920 Indirect Bent Tube Gas Fired Heater with 20" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  22. R4-IBT-1000-300-300-400-920 Indirect Bent Tube Gas Fired Heater with 20" Blower, 3 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 20:1 Max Turndown for NG, (16:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  23. R4-IBT-1200-400-400-400-920 Indirect Bent Tube Gas Fired Heater with 20" Blower, 3 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 18:1 Max Turndown for NG, (15:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  24. R4-IBT-1400-300-300-400-400-920 Indirect Bent Tube Gas Fired Heater with 20" Blower, 4 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 28:1 Max Turndown for NG, (23:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  25. R4-IBT-1600-400-400-400-400-920 Indirect Bent Tube Gas Fired Heater with 20" Blower, 4 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 24:1 Max Turndown for NG, (20:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  26. R5-IBT-400-925 Indirect Bent Tube Gas Fired Heater with 25" Blower, 1 Furnace, Electronic Full Modulation, Constant 80% Efficiency, and 6:1 Max Turndown for NG, (5:1 Max Turndown for LP)x. Stainless Steel Burners and Heat Exchangers.
  27. R5-IBT-800-400-400-925 Indirect Bent Tube Gas Fired Heater with 25" Blower, 2 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 12:1 Max Turndown for NG, (10:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  28. R5-IBT-1000-300-300-400-925 Indirect Bent Tube Gas Fired Heater with 25" Blower, 3 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 20:1 Max Turndown for NG, (16:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  29. R5-IBT-1200-400-400-400-925 Indirect Bent Tube Gas Fired Heater with 25" Blower, 3 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 18:1 Max Turndown for NG, (15:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  30. R5-IBT-1400-300-300-400-400-925 Indirect Bent Tube Gas Fired Heater with 25" Blower, 4 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 28:1 Max Turndown for NG, (23:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
  31. R5-IBT-1600-400-400-400-400-925 Indirect Bent Tube Gas Fired Heater with 25" Blower, 4 Furnaces, Electronic Full Modulation, Constant 80% Efficiency, and 24:1 Max Turndown for NG, (20:1 Max Turndown for LP). Stainless Steel Burners and Heat Exchangers.
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