Thermal Mass & Night-Flush Cooling (2D)

Buildings with heavy thermal mass — exposed concrete, masonry, thick rammed earth — absorb the day's heat slowly and release it hours later, flattening the indoor temperature swing that a lightweight structure would otherwise transmit almost instantly. This 2D simulator runs the same simplified RC (resistance-capacitance) thermal model as the 3D version, but simulates the light, medium, and heavy shells simultaneously, side by side, against a shared sinusoidal outdoor day/night cycle. Toggle night-flush ventilation (pulling in cool night air to purge stored heat before the next day), pan across the three-building row, and scrub the rolling temperature chart to see exactly how many degrees of peak indoor temperature — and therefore cooling load — thermal mass and night flushing avoid compared to a lightweight, unflushed reference building.