Natural ventilation systems, operable windows, clerestory windows, green roofs, living walls, solar shading devices, overhangs, louvers, light shelves, reflective surfaces, evaporative cooling systems, radiant cooling panels, displacement ventilation, underfloor air distribution, thermal massing, earth tubes, wind catchers, solar chimneys, green fa\u00e7ades, double-skin facades, internal courtyards, open staircases, vertical greenery, natural convection, stack effect, cross-ventilation, whole-building ventilation, night flushing, mixed-mode ventilation, hybrid ventilation systems, energy-efficient HVAC systems, sustainable building design, academic buildings, educational facilities, modern architecture, bright interior spaces, abundant natural light, airy atmosphere, comfortable learning environments.