Heat black filled icon
Three wavy arrows rising from a flat surface inside a circle
About the Heat black filled icon
A flat diamond-shaped plane sits inside a thin circular frame, with three wavy arrows curling upward from its surface to show heat radiating away. The wavy shafts read as warm air, steam or thermal energy leaving a hot object, which suits HVAC and heating controls, thermostat and smart-home apps, appliance manuals, cooking and oven interfaces, and material or fabric property labels.
The three arrows rise at equal spacing with matching arrowheads, so the motion reads as a steady upward flow rather than random squiggles, and the low flat plane anchors them. It pairs with cold, humidity and temperature gauge icons from the same set. Keep at 32 px so the wave curves stay separate.
This is the solid black filled version of the heat icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
