
What is a Primary Air Filter? Types, Efficiency Grades & B2B Sourcing Guide
In commercial HVAC, cleanroom design, and heavy industrial filtration, the primary efficiency air filter (commonly referred to as a primary air filter or
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Safety meets peak performance with the Chuqi Flame Resistant Ceiling Filter. Fully compliant with F-1 DIN53438 and UL900-Class2 international standards, this filter media is engineered for high-stakes industrial environments where fire prevention is a top priority. With a Maximum Working Temp of 100°C, it is the premier spray booth filter choice for facilities that operate under elevated temperatures. Trust our certified anti-breaking synthetic fiber to provide reliable particulate capture without compromising airflow or safety.
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| Feature | Chuqi Safe-Guard (Scheme 2) | Standard Synthetic Filters | The Chuqi Advantage |
| Fire Safety | F-1 DIN53438 & UL900-Class2 Certified. | Non-certified or basic flammable media. | Risk Mitigation: Ensures facility safety and simplifies insurance compliance. |
| Heat Stability | 100°C Continuous Operation. | Typically degrades or melts above 60°C. | Reliable Performance: Safe for use in drying rooms and curing ovens. |
| Initial Resistance | As low as 25Pa. | Often 40Pa – 60Pa. | Energy Savings: Reduces the power consumption of your spray booth ventilation system. |
| Air Discharge | Anti-static High-Density Cloth. | Raw fiber surface (shedding risk). | Flawless Finish: Prevents fiber migration from contaminating the work area. |
| model | M W-450G | M W-500G | M W-540G | M W-560G | M W-600G | LW-600G | LW-650G | M WB-400G | M WB-450G | M WB- 500G |
| color | White | White | White | White | White | White | White | White | White | White |
| gram | 450G | 500G | 540G | 560G | 600G | 600G | 650G | 400G | 450G | 500G |
| Thickness (mm) | 20 | twenty two | twenty two | twenty three | twenty three | twenty three | 25 | 20 | twenty two | twenty three |
| Filtering levels | F5 | F5 | F5 | F5 | F5 | F5 | F5 | F5 | F5 | F5 |
| Maximum operating temperature (degrees) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Cotton production number | 2800# | 3200# | 3500# | 3700# | 3900# | 4000# | 4500# | 2800# | 3200# | 3500# |
Certified Flame Resistance and High-Temperature Stability Safety and reliability are non-negotiable in industrial coating environments. Our ceiling filters are engineered to meet the strictest international safety standards, including F-1 DIN53438 and UL900-Class2 flame resistance certifications. Furthermore, our media maintains structural integrity at a Maximum Working Temp of 100°C, providing a safe and durable solution for heavy-duty spray booths and curing drying rooms where heat resilience is essential for operational continuity.

Q1: What does the F-1 DIN53438 certification mean for my facility?
It is a high-level German fire safety standard. Being F-1 certified means our media is self-extinguishing and meets strict industrial safety codes for fire prevention.
Q2: Can I use this filter in my paint drying oven?
Yes, as long as the temperature does not exceed its Maximum Working Temp of 100°C, it is specifically designed for drying rooms and curing zones.
Q3: How often should I replace the flame resistant media?
Thanks to the progressive density structure, the media filters gradually to prevent surface clogging, typically allowing for longer service cycles than standard filters.
Q4: Does the flame resistance affect the airflow efficiency?
Not with Chuqi. We maintain an initial resistance as low as 25Pa, ensuring that you get full safety compliance without increasing your energy costs.
Q5: Is this filter suitable for high-humidity environments?
Yes, the synthetic fiber and heat-welded construction are moisture-resistant, maintaining structural integrity and efficiency even in humid industrial conditions.

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