Technical content reviewed November 12, 2026 · Tillman & Associates
Where XB fits
XB is a natural-convection electric heater. The catalog identifies control cabinets, small enclosures and industrial spaces among its applications. Heat moves into the surrounding air without a fan-driven discharge.
Begin with the space-heating requirement and the location classification. Include enclosure dimensions, ventilation and desired room temperature when available. XB is not a substitute for an inline heater intended to heat a process stream.
Construction and temperature code
The catalog describes aluminum convectors, black-anodized heat-transfer surfaces and a terminal housing arranged for wiring access. Output, electrical supply and temperature code are part of the selection; a wattage match alone is incomplete.
A hazardous-location temperature code concerns permitted surface temperature, not the thermostat setpoint or desired room temperature. Send the required class, division or zone, gas/dust group and temperature code so the exact certified model can be reviewed.
Mounting and ambient conditions
The owner’s manual requires the correct installation orientation and checks against the heater nameplate. Wall and floor mounting arrangements keep the heater vertical; available clearances and the location of nearby equipment must be considered.
Standard and high-ambient models have different operating ambient limits. Do not assume that a high-ambient option is included in a standard replacement. Provide the minimum and maximum expected temperature and describe moisture or other environmental exposure.
Thermostats and replacement requests
Integral and remote control arrangements should be selected with the heater’s electrical requirements and approval set. The manual distinguishes thermostat kits by electrical configuration, including a separate high-ambient arrangement.
For a replacement, send a clear photograph of the complete heater label, thermostat and mounting arrangement. Tillman can review whether the request is for a complete heater, a compatible control accessory or factory assistance with an existing unit.
What to send Tillman
- Required heating output or enclosure/room heat-loss details
- Voltage, phase and frequency
- Complete area classification and required temperature code
- Minimum/maximum ambient temperature and environmental exposure
- Available mounting space, orientation and thermostat arrangement
- Existing heater/control labels, photos and quantity
Common questions
Does XB have a fan?
XB uses natural convection rather than a fan-driven air discharge.
Can XB heat air inside a duct?
It is a space heater. Ask Tillman to review a duct-heater family for a moving air or gas stream.
Does the temperature code set the room temperature?
No. The temperature code limits surface temperature for the rated hazardous-location application.