Which type of exhaust is required in smoking lounges?

In smoking lounges, mechanical exhaust systems are essential due to their ability to actively ventilate and remove air contaminants. These systems utilize fans to expel the smoke-laden air, ensuring that fresh air is drawn in from outside to replace the contaminated air. This is crucial in maintaining indoor air quality and minimizing the impact of secondhand smoke on patrons and staff.

Natural exhaust relies on the natural movement of air, which can be inadequate in high-density areas or during periods of low wind, leading to the potential buildup of smoke and odors. Passive systems typically allow air to seep out and are not actively controlled, making them less effective in environments where air quality must be tightly regulated.

Filtered exhaust might incorporate some form of cleaning mechanism, but it doesn't address the need for consistent and effective removal of smoke and pollutants at the rate required in smoking lounges. Thus, mechanical exhaust is the most suitable solution, providing the necessary ventilation to create a safer, more comfortable environment for users.