The Passive Design Combo That Saves 88% Of Energy

About this Video

• Video Title: The Passive Design Combo That Saves 88% Of Energy
• Channel: Sara Saadouni
• Speakers: Sara Saadouni
• Duration: 00:06:38

Introduction

This video analyzes a school in Belgium that consumes 88% less energy than comparable schools. The video focuses on two passive design strategies—the earth air tunnel and the "volcano" shaped green roof—explaining how they individually and collectively reduce energy consumption.

Key Takeaways

• Earth Air Tunnel: This system uses the stable temperature of the earth (2-4 meters deep) to preheat air in winter and cool it in summer before it enters the building, significantly reducing heating and cooling needs. The system's components include an air inlet, a pipe acting as a heat exchanger, and a fan.
• Volcano-Shaped Green Roof: This design enhances the stack effect (warm air rising and escaping) and improves cross-ventilation, preventing overheating, even in temperate climates experiencing increasingly frequent heat waves. The design's shape accelerates the evacuation of hot air.
• Combined Effect: The earth air tunnel and volcano roof, along with other high-performance building elements (triple-glazed windows, heavy insulation, air tightness), create a synergistic effect resulting in an 88% reduction in energy consumption.
• Importance of Passive Strategies: The video emphasizes prioritizing passive design strategies before incorporating mechanical systems to maximize energy efficiency and sustainability.
• Overheating in Temperate Climates: The video highlights the growing problem of overheating in even temperate climates due to climate change and improved building insulation, showcasing the green roof's importance.