Ventilation is an important factor to consider for all areas. No matter the commercial activity in that area, ventilation shall ensure the building is able to be occupied. People, processes and products produce wastes into the air, which has to be cleaned out, and clean air brought in to support life. This is the work of an exhaust ventilation system in such buildings. This calls for you to make sure you have the right one installed in your specific building. This page has more info.
You should start by finding out what airflow rate shall fit the room. When you understand the quantity of air needed to move through a room, you will manage to pick the right power rating for the fan. Airflow rate shall be written as cubic feet per minute (CFM). There is a CFM rating in each fan out there, to make for an easy selection process.
You will then have to find out what the occupancy and area details are. You can then check with the local authorities on their guidelines of what the proper figures in your area are. You shall refer to that on this site.
There is also the issue of air change. There are several rooms in which you cannot expect the number of people in there to be fixed. This translates to more air being needed when that number fluctuates at a higher rate. More people in it means more fresh air is needed as more waste is released into the air. This calls for some powerful fans to change that air much faster. If the activities and people in there are not many, a slower fan will do.
There is also a need to factor in the ability of the fans to remove the heat in the room. You need this system to give off a cooler place to sit, apart from the cleaner and to breathe. As more and more people use the room, the need to cool the room down shall increase. This is also the case with areas where there is a lot of activities going on. Shop here for the best fans.
You should lo think of the static pressure. The more the fans work, the more they will have to overcome the static pressure resistance they encounter. You therefore need to invest in fans powerful enough to deal with that pressure and deliver on their promise to remove the waste air. The system in place shall also add to that pressure. The more elaborate the system ductwork is, the more there shall be the pressure it needs to beat. There is also friction in the filters to think of.
There are even more factors you need to think of when choosing the right exhaust system for your building. You will find out more about them on this site. Read more here: https://www.britannica.com/technology/ventilating.