Rooftop Chiller Unit

Rooftop plant unit, a 4m by 2m by 1.8m white chamfered box on a dark grey skid frame with a recessed louvre face, two large sunken fan discs on top and one thin pastel-cyan strip along the service side; a size knob steps it to a 4x4m twin-fan unit.

风格：low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit