Symbol Heat Pump Metal Sign

About the Heat Pump design

A single length of pipe wanders across the drawing, dropping into two deep U bends under a heavy ground line, lifting into a tall arch between them, then climbing at the right and bending square into an arrow that shoots off the corner. The buried box below is drawn as a thin open frame with softened bottom corners, and the pipe's loops hang inside it like the trap under a sink. That arrowhead is the only straight-edged, angled shape here, a blunt chevron among all those curves.