This frameless window box seat features two side panels, a front panel, and a glass top joined with black structural silicone. It is constructed from solar‑reflective, self‑cleaning, heat‑soaked toughened glass. The unit uses 6‑16‑6 double glazing with a glass U‑value of 1.0, delivering an overall U‑value of 1.4 when paired with a thermally broken coated aluminium frame.