This is the Kotłownia icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
A square with rounded edges, except where the top side of the square would be there is instead the roof. The shape overall resembles a simple house. Inside there are three curvy lines that run towards the roof of the house to the bottom of the square. Each of the curvy line is next to each other.