Heating Range ( kW )

Airflow Range ( CFM )



CSA C/US - Certified to Canadian and U.S. standards  


North American

Hazardous Location


  • Class I, Divisions 1 & 2, Groups C & D
  • Class II, Divisions 1 & 2, Groups F & G
  • T3B
  • Class I, Zones 1 & 2, Groups IIA & IIB, T3


  • Temperature code Division System - T3B 165 deg C (329 deg F);
  • Zone System - T3 200deg C (392deg F)
 Cabinet Cabinet material  14-gauge (0.075 in.) (1.9 mm) steel. Red epoxy/polyester powder coated with five-stage pretreatment, including iron phosphate.
 Fan guard  Split design with close wire spacing. A 3/8 in. (9.5 mm) diameter probe will not enter. Black polyester powder coated.
 Louver blades  Anodized extruded aluminum.

 Conduit materials

& fittings

  Plated steel and aluminum alloy for corrosion resistance.
 Fasteners   Zinc plated steel for corrosion resistance.
  Enclosure  Cast aluminum (non-copper alloy) NEMA Type 7 & 9 with O-ring.
 Mounting holes   9/16 inch diameter holes - Four located on the top face of heater.



  Motor type   Explosion-proof, thermally protected, 1725 RPM permanently lubricated ball bearing type with 56 frame and "easy-off" fan blade replacement feature.
 Fan  Multi-blade aluminum, steel spider and hub with 5/8 in. bore.



 Heating elements  Long-life, low watt-density, high grade metal-sheathed Heat transfer fluid Ethylene glycol and water including corrosion inhibitors.
 Header material  Carbon steel.
 Heat Exchanger Core  Carbon steel shells and carbon steel tubes with copper-free, roll-formed aluminum fins @ 10 fins per in. Evacuated and sealed. Sprayed with black, high heat enamel paint.

 Temperature  high limits

  One automatic reset rated for 100,00 cycles, and one manual  reset. Both are snap-action bimetal type, open on temperature rise.
 Pressure relief   Preset 100 psig (689 kPa) aluminum body pressure relief valve.
 Controls Control circuit   Built in 120 V control. Optional 24V control available.
 Control contactor 

 40 amp. Rated for 500,000 mechanical operations.

 Control transformer Multitap primary, 120V or 24V secondary.
  Fuse protection  Thermal delay fuse (spare included).
  Room thermostat(optional) Built in, TBX1 explosion-proof thermostat, 40 F to 80 F (5 C to 27 C)


  Ambient temperature  -49 F to 104 F (-45 C to 40 C).
 Maximum altitude 

ASL 7500 ft (2300 m).


5 Files


Unit Heater Marketing Catalog
Unit Heater Marketing Catalog
Download File
1.3 MB
Electric Heater Marketing Catalog
Electric Heater Marketing Catalog
Download File
1.1 MB
Heating & Ventilation Product Line
Heating & Ventilation Product Line Card
Download File
553.6 kB
VRF Product Line
VRF Product Line Card
Download File
369.1 kB
Cooling & Ventilation Product Line
Cooling & Ventilation Product Line Card
Download File
462.8 kB

Technical Data
1 File

Technical Data

Catalog - Electric Heater
Electric unit heater catalog
Download File
777.3 kB

3 Files


Unit Installation Manual - EXUB
Installation manual for Model EXUB
Download File
1.1 MB
Parts Manuals - Electric Heater Parts Manual
Parts manual for all electric heater models
Download File
2.1 MB
Field Service - Replacement of Discontinued Relays
Installation for kits designed to replace relays no longer available from suppliers. Applies to all Reznor units using obsolete relays.
Download File
340.4 kB

Other Files
1 File

Other Files

Warranty Statement
Reznor equipment limited warranty statement
Download File
183.4 kB