What Is the Difference Between Static and Dynamic Fire Dampers?

1.Static Fire Dampers

Static fire dampers are used for duct systems where the HVAC fan is stopped when the fire alarm is triggered. Static fire dampers use gravity and a spring-loaded system to close when they are activated. Because there is no air flow when they are actuated, they have no need to resist high-velocity air pressure.



Dynamic Fire Dampers

Dynamic fire dampers, however, are employed in duct systems in which the HVAC fan remains in operation when a fire breaks out. These dampers have a spring-loaded assembly and are made to close against air movement. While static dampers rely upon the presence of gravity for their closure, dynamic fire dampers are actually tested under conditions of air pressure.

2. Operational Differences

In realizing what is the difference between static and dynamic fire dampers, their operational features have to be studied:

Static fire dampers utilize passive closure. When the fusible link burns at a temperature, the damper drops in place by gravity or a mere mechanical spring.

Dynamic fire dampers have fortified springs and are designed to close even when the air pressure of the HVAC system remains.

3. Installation Inside an HVAC System

Another important feature of what is the difference between static and dynamic fire dampers is where they are mounted in an HVAC system:

Static fire dampers are mounted in horizontal ducts, where airflow is stopped when the HVAC system malfunctions.

Dynamic fire dampers are mounted in vertical ducts, where airflow will not stop even in the event of a fire, so the damper must close into moving air.

4. Airflow Considerations

Static dampers are not designed to be rated for air velocity and pressure since they function when the HVAC is turned off.

Dynamic dampers are tested for resisting certain air velocities and pressures, so that they can effectively seal in operating airflows.

5. Testing and Regulatory Compliance

Fire codes demand both dynamic and static dampers to be compliant with NFPA standards. However, testing conditions are different:

Static fire dampers are tested without air movement.

Dynamic fire dampers are subjected to extensive testing under conditions that simulate active air pressure to guarantee they will operate correctly.

Why is it crucial to select the right fire damper?

It is essential to use the proper fire damper type to uphold fire safety and satisfy building codes. Incorrect application of static or dynamic fire dampers can lead to:

Insufficient fire containment

Non-compliance with fire safety regulations

Risk of fire spreading and smoke through a building increased


Comments

Post a Comment

Popular posts from this blog

What Is Done in a Professional HVAC Cleaning?

Image
 Maintaining a clean HVAC system is crucial for energy efficiency, better indoor air quality, and prolonging the life of your system. While DIY maintenance can be done on a regular basis, nothing is as effective as the level of cleaning done by a professional HVAC cleaner. So, what does a professional HVAC cleaning entail? Most homeowners do not know the step-by-step process of making sure their system operates efficiently and safely.In this article, we will take you through what a professional HVAC cleaning entails and the major benefits and why they are important to have a healthy home. Why Is Professional HVAC Cleaning Necessary? Over time, dust, dirt, and debris get settled in your HVAC system's components, decreasing its efficiency and negatively affecting indoor air quality. A professional clean works beyond surface level and reaches all the vital components of the system, so all the components can work at peak performance.   1. Initial System Check-up and Analysis The p...
Read more

How AirRestore Guarantees Safe and Compliant Kitchen Extract Cleaning

Image
In high-pressure commercial kitchens, the kitchen extract system is relied upon to remove grease-contaminated air, odors, smoke, and heat. But with no routine professional cleaning, the system is a fire hazard and a compliance disaster waiting to happen. That's where AirRestore enters the picture with an end-to-end, safety-oriented approach to kitchen extract cleaning throughout New Zealand. 1. Why Kitchen Extract Cleaning Is Critical Grease and carbon deposits build up over time in the canopy, filters, ductwork, and fans. If left alone, this build-up becomes: Extremely flammable, heightening fire risk. A compliance failure under NZ fire safety laws. A cause of poor indoor air quality, impacting staff and customers. A basis for insurance claim denials in the case of a fire. AirRestore removes these risks through its professional services. 2. Step-by-Step Cleaning Process AirRestore uses a diligent process that surpasses industry standards: Cooking frequency and type (e.g., greasy ...
Read more

Why Do Fire Dampers Fail?

Image
Why Do Fire Dampers Fail? 1. Lack of Regular Maintenance Perhaps the most prevalent cause of failure of what fire dampers are is the lack of regular maintenance. Fire dampers need regular inspection, cleaning, and testing to guarantee proper functioning. Over time, dust, dirt, and debris build up, causing them to get stuck and not close when they are activated by heat or smoke. 2. Corrosion and Rust HVAC systems are subject to different moisture levels, causing corrosion and rust deposits on fire dampers . Corrosion of the damper blades or other parts could make them ineffective in closing when needed, which means they won't be able to prevent the spread of fire and smoke. 3. Fusible Link Failure Fire dampers are fitted with fusible links that will melt at a specified temperature, causing the damper to close. In case the fusible link is broken, installed incorrectly, or beyond its suggested replacement time, the fire damper will not function during a fire incident. 4. Ductwork Obs...
Read more