Technical content reviewed November 12, 2026 · Tillman & Associates
How FE2 provides space heating
FE2 is an electric fan-forced unit heater using the manufacturer’s VacuCore liquid-to-air heat exchanger. The sealed core transfers heat to air circulated by the fan. It is electric space-heating equipment, not a fluid unit heater requiring a field heating-water supply.
The catalog identifies dry indoor industrial applications, including refining and processing facilities. The specific installation location and equipment marking still determine suitability.
Certification is part of the selection
Thermon identifies FE2 as CE marked and ATEX approved. Send the exact zone, gas group, temperature class and conformity requirements from the project documents. The complete model and certificate conditions must match the application.
Do not assume ATEX approval automatically satisfies a US Class/Division specification, or use the FX6 family’s approvals to describe FE2. Similar-looking unit heaters can serve different certification requirements.
Electrical configuration and service conditions
The catalog includes multiple voltages, phases and frequencies, with model-dependent options. Identify the available supply and required heat output together. For low-temperature locations, include the minimum ambient and ask about the exact low-ambient configuration.
Published manuals can cover different versions and temperature ranges. Use the instructions and certification supplied for the selected model, especially when comparing an older replacement with a new unit.
Mounting, airflow and maintenance
Review the mounting arrangement, air-discharge direction and service access along with the heating duty. Include vibration, moisture and chemical exposure in the inquiry. An ingress-protection option should not be interpreted as permission for a different installation environment.
The literature describes a replaceable core, but replacement must follow the applicable maintenance instructions and approved parts requirements. Send the heater model and serial number for service parts. Qualified personnel must isolate power and follow hazardous-location service procedures.
What to send Tillman
- Heat-loss requirement or kW and indoor design temperature
- Required zone, gas group, temperature class and certification
- Voltage, phase, frequency and minimum/maximum ambient
- Dry indoor location, vibration and chemical/moisture exposure
- Mounting height, discharge direction, thermostat/options and quantity
- Model/serial labels and existing certificate information for replacements
Common questions
Is FE2 a hot-water unit heater?
No. It is electric heating equipment using a sealed liquid-to-air core.
Can FE2 replace FX6 using the same output?
Output alone is insufficient. Compare certification, supply, ambient limits, mounting and controls.
Does a low-ambient option apply to every model?
Do not assume so. Provide the minimum temperature and exact configuration for confirmation.