Passive solar heat gain (winter)

Solutions

• South-facing glazing sized for winter gain: Glazing area and placement calculated to capture low-angle winter sun.
• Slate-clad solar air heater (wall-mounted thermosiphon collector): A south-facing wall-mounted box (tested at 2m2) with a black-slate absorber behind glazing; convective baffles route room air drawn in low, heated by the sun, a