Heat black filled icon
Three wavy heat lines rising from a flat surface, shown in outline style
About the Heat black filled icon
Three tall wavy lines rise in parallel from a flat surface drawn as a shallow open bracket, the shorthand for warmth radiating off a hot object. No flame or sun is shown, so it stays neutral enough for cooking, weather and machinery. Use it on oven and stove controls, HVAC and thermostat screens, weather widgets, hot-surface warning labels and spa or sauna pages.
The three waves are evenly spaced and identical in height, each curving twice, which keeps the mark balanced; the base line anchors them with short upturned ends. Pairs with steam, snowflake and thermometer icons. Thin strokes need at least 24px.
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.
