HVAC engineers

 Natural vs Mechanical Ventilation - HVAC Design Essentials Ventilation plays a key role in Indoor Air Quality (IAQ), comfort, energy efficiency & sustainable building design. 1. Natural Ventilation Uses windows, openings & cross ventilation Driven by wind pressure & stack effect Energy & Green Benefits: Zero fan energy consumption Reduces HVAC cooling load Supports passive & green building design Limitations: Uncontrolled airflow Climate dependent No filtration 2. Mechanical Ventilation Uses fans, AHU, FAHU & exhaust systems Provides controlled airflow & filtration Energy Considerations: Higher energy consumption (fans + conditioning) Can be optimized with: VFD (Variable Frequency Drive) Heat Recovery (HRV / ERV) Demand Control Ventilation (CO₂ sensors) 3. Design Criteria (As per Standards) Fresh air rates as per ASHRAE 62.1 Compliance with Energy Conservation Building Code Maintain proper ACH (Air Changes per Hour) 4. Sustainable HVAC Approach Use natu...