Heating Room Icon in Material Style

This Heating Room icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,400 icons, all in the same style and quality.
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.