| What Is Ventilation? |
| Natural Ventilation |
| Natural ventilation takes into account the environmentıs existing wind forces and attempts to utilize them by channeling them effectively through specific openings in the built facade. | |
| Considerations |
| Exterior Environment Interior Environment | |
| -Prevailing winds -Cross ventilation | |
| -Orientation of building on the site -Stack ventilation | |
| -Shape of building -Atrium ventilation | |
| -Planting around the building -Pre-heating | |
| -Relationship to other buildings -Radiant heating | |
| -Windward and leeward sides -Windows | |
| -Air quality |
| Exterior Environment |
| AIRFLOW |
| Winds circulate from warm low latitudes to cold high latitudes. | |
| Winds blow from high to low pressure regions | |
| Winds usually flow east-west rather than north-south |
| Windward & Leeward Sides |
| Wind will enter from the windward side and exit out the leeward side. |
| Orientation of Buildings |
| Les Habitations Jeanne Mance |
| Shape of the Building |
| Air Quality |
| Interior Environment |
| Atriums |
| Slide 13 |
| Cross Ventilation |
| Stack Ventilation |
| Airflow |
| Heat Distribution |
| The 4 Basic Double Skin Facades |
| Buffer Facade | |
| Extract Air Facade | |
| Twin Face Facade | |
| Hybrid Facade |
| Buffer Facades |
| Oldest double skin facade-has been in use for nearly 100 years | |
| Two layers of glazing mounted ~250mm-750mm apart | |
| Developed before insulating glazing was invented to increase sound and heat insulation without reducing daylight. | |
| Occidental Chemical
Center Cannon Design Inc. |
| Extract Air Facade |
| Used where natural ventilation is not possible. | |
| Main double-glazed skin of insulation glass with a second single-glazed skin placed inside the air space | |
| The usedı air in the air space is extracted with fans meanwhile tempering the inner layer while the outer layer of insulating glass minimizes heat transmission loss. |
| The Heliconı Finsbury
Pavement Sheppard Robson |
| Twin-Face Facade |
| Internal skin used for insulation which minimizes heat loss. | |
| Interior facade windows can be opened while exterior facade ventilation openings moderate temperature extremes inside the facade. | |
| Use of windows allows night time cooling of interior. |
| Caisse de Depots et
Placement Eric Gauthier Architect |
| Jean Marie Tjibaou Cultural
Center Renzo Piano |