Pentair Thermal Management Becomes nVent
- A New Opportunity to Spark Innovation

Your trusted brands RAYCHEM, TRACER, NUHEAT, PYROTENAX and TraceTek are now part of nVent Thermal Management.

The new company website is in development and will be launched in January 2019. Until then, we are happy to serve your information needs through our current website.

For more information on nVent:
Download press release
Visit nVent.com
(currently English only)

Window Mullion Heating (WMH) System


nVent RAYCHEM Window Mullion Heating (WMH) is a complete heating solution installed in window frames. The system utilizes high wattage self-regulating cable installed in an engineered aluminum tray assembly offering efficient, high performance heat that keeps your windows free of frost and moisture.

  • High power output for high performance requirements
  • Uniform heat transfer for energy efficiency
  • Concealed and mechanically protected heating cable for aesthetics and longevity
  • System fastened to the surface
Custom designs available

Technical Specifications

Material selectionKynar® painted aluminum
Color selection23 standard colors, 8 custom colors
System ComponentsAluminum Extrusion, cover panel to match mullion color and dimensions, heat tracing cable, heat shrink connection kits
Heat trace cable suppliedGM-1X for 120 V applications
GM-2X for 208-277 V applications
DimensionsExtrusion thickness: ¾ inch
Extrusion width: 1 7/8 inch



Warranty Information

Warranty Extension Available

Connection and Protection