Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

HTR

IEC

Electric space heater plan mark

Fixed space heaters such as panel heaters, convector heaters and radiant wall heaters are drawn as a rectangle at the wall with parallel strokes or a zigzag representing the heating element. The rating in watts or kilowatts is usually written beside the symbol.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Space heater. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

A heating element in a schematic is a component; this plan mark represents an installed heater appliance.

Full reference

HEATER

Symbols

Heating element

A heating element converts electrical energy to heat in a documented circuit. Its supply, power rating and control/protection path need to be identified for cabinet or auxiliary-system use.

Drawing use: SLD / Schematic
Application: Control circuits
Reference family: IEC / Manufacturer

A distinction that matters

A heater is a load; its thermostat is a separate switching or measurement function.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.