When we have decided to purchase a fire smoke exhaust damper, we need to further understand the remote-controlled smoke exhaust valve in many aspects to make a good decision. At this time, we should figure out from which perspectives to understand the product details.  Properly understand the application conditions of the fire smoke exhaust damper. Different products have different specific parameters and application scenarios. We can properly understand these specific aspects and have knowledge of all application environments, so that we can purchase a more suitable product. Some fire smoke exhaust damper manufacturers produce products suitable for ventilation locations, some for central air conditioning systems, and others for fire smoke exhaust damper systems. These factors may cause an increase in the smoke leakage of the valve; in addition, the decrease in the elastic force of the spring at low temperatures may also lead to a rise in the smoke leakage of the valve.