Haiti's ventilation system design must be tailored to its tropical climate (high temperatures and distinct wet and dry seasons) and building requirements. Key points are as follows:

1. Climate-Adaptive Design

Haiti's climate is primarily tropical savannah, with year-round high temperatures. Mechanical ventilation prioritizes heat removal and humidity control. An energy recovery ventilation (ERV) system 

is recommended to remove hot and humid air while recovering energy, reducing air conditioning load.

2. Core Ventilation System Parameters

Air Change Rate: 10–12 air changes/hour is recommended for general areas, while 15–20 air changes/hour is recommended for high-risk areas (such as chemical laboratories).

Negative Pressure Control: Maintain a negative pressure of -5 Pa to -10 Pa in the room to prevent the spread of harmful gases.

3. Special Requirements for Hospitals and Laboratories

Directional Airflow: Patient rooms should have air supply on one side and exhaust on the opposite side to avoid backflow contamination.

High-Efficiency Filtration: High-efficiency filters should be installed if the exhaust air contains pathogens. 4. Vent Location and Safety Standards

The fresh air inlet must be located away from pollution sources (such as cooling towers) and at least 3 meters above the ground.

The exhaust vent should be at least 3 meters above surrounding buildings to avoid short circuits.

For specific project examples or equipment selection, please search "Haiti ERV Ventilation System Design Standards" or "Ventilation Technology for Tropical Climates."