Jet Fan System in Underground Parking What is the main function? Jet fans are used to control and remove vehicle exhaust gases, mainly: 1- Carbon Monoxide (CO) 2- Nitrogen Oxides (NOx) 3- Other combustion pollutants Without proper ventilation, these gases can accumulate quickly in enclosed parking areas. How does the system work? Instead of using large ductwork networks, jet fans create high-velocity air streams that push contaminated air toward designated exhaust points. The system typically includes: - Jet fans installed across the parking area - Fresh air supply openings - Main exhaust fans connected to exhaust shafts - CO sensors that control fan operation When CO levels rise, the system automatically increases ventilation. Key Advantages 1- Reduces CO concentration and improves air quality 2- Eliminates the need for extensive duct systems 3- Saves space and construction cost 4- Improves air movement across the entire parking floor 5- Can also support smoke control strategies...
Heat Recovery Ventilation (HRV) - How It Works A Heat Recovery Ventilator (HRV) is a mechanical ventilation system that recovers heat from exhaust air and transfers it to incoming fresh air without mixing the two air streams. ✦ Main Components 1. Supply Fan - Draws fresh air from outside. 2. Exhaust Fan - Removes stale indoor air. 3. Heat Exchanger Core (Aluminum / Polymer) - Transfers heat between air streams. 4. Air Filters - Remove dust and contaminants. 5. Condensate Drain - Removes moisture formed during heat exchange. 6. Dampers - Control airflow direction and volume. ✦ Working Principle 1. Fresh outdoor air enters the HRV through the intake duct. 2. Stale indoor air is simultaneously extracted from the building. 3. Both air streams pass through a heat exchanger core. 4. Heat transfers from the warmer air to the cooler air without mixing the air streams. 5. The system pre-heats or pre-cools the fresh air before it enters the room. ✦ Key Benefits ✓ Improves indoor air qualit...