Thermon RTF FlexiPanel: Tank & Vessel Heating Panel
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Non-Metallic Tank and Vessel Heating Panel

Self-contained, high performance flexible heating panel designed for use on fiberglass and plastic tanks or vessels and for metallic tanks and vessels containing high viscosity or temperature-sensitive fluids.

Provides heat outputs at 1,085 watts per square meter or less & distributes heat evenly over the entire panel surface to maintain stable temperatures.

Approved for use in ordinary (nonclassified) and hazardous (classified) areas.
Operating Voltage: 120 or 240 VAC
Maximum Maintenance Temperature: 121°C


RTF FlexiPanel: Features

RTF FlexiPanel Heating Panels

  • Low profile flexible design permits rapid, troublefree installation using our mounting kit
  • Heating panel utilizes a parallel circuit design based on a stamped high temperature alloy heating element to ensure multiple flow paths for electrical current to pass.
    This eliminates the burnout potential common with series wire-based designs.
  • The rugged construction includes a tough metal jacket that provides mechanical protection during handling and installation.
    The panel’s heating element is further protected from vibration and moisture by sandwiching it in a heat-laminated layer of silicone rubber that provides cushion and a watertight seal.

Construction of Heating Panel

  1. High temperature lead wires (16 AWG)
  2. Protective metal jacket
  3. Parallel circuit high temperature alloy heating element
  4. Heat-laminated, high temperature silicone rubber insulation


  • Nominal output: 300 and 500 watts
  • Supply voltage: 120 or 240 Vac
  • Max. maintenance temperature: 121°C
  • Max. continuous exposure temperature (power-off): 232°C
  • Minimum installation temperature: -55°C
  • T-rating²: T2C to T6

²T-rating based on stabilized design or use of over limit control.

Circuit Breaker Sizing and Type

Multiple panels can be energized from the same circuit breaker based on operating voltage and current draw. Breaker sizing should be based on the National Electrical Code, Canadian Electrical Code or any other applicable code.

The National Electrical Code and Canadian Electrical Code require groundfault protection of equipment for each branch circuit supplying electric heating equipment. Check local codes for ground-fault protection requirements.

Lead Wires and Terminations

Each FlexiPanel is equipped with 2.44 m long high temperature silicone rubber insulated wires with a 1/2" liquid-tight conduit fitting. Optional SO cords are available; contact Thermon.

Thermon RTM: Mounting Kit
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