Metal Tornado Soundproof Box (2500 m³/h) – 355mm Flange by Cyclone

The Metal Tornado (2500 m³/h) with 355mm mouth is a high-performance soundproof fan box designed to move massive volumes of air while keeping noise levels to an absolute minimum. Built by Cyclone, this unit combines a heavy-duty galvanized steel housing with a premium Torin-Sifan motor, offering the perfect balance between industrial power and the stealth required for a professional indoor grow.

Why your current ventilation setup might be failing you

Let’s be real: trying to cool down a large grow room with standard plastic extractors is a nightmare. You are likely dealing with heat pockets that stress your plants, humidity spikes that invite mold, and worst of all, a noise level that sounds like a jet engine taking off in your spare room. It’s stressful, it’s risky, and it screams "amateur hour."

If you don't upgrade, you are looking at stunted growth due to poor Climate Control and the constant paranoia that your neighbors can hear your equipment through the walls. A loud grow is a detected grow, and a hot grow is a failed harvest. You can't afford to compromise on air exchange when your yield is on the line.

The Metal Tornado 2500 is the game-changer you’ve been waiting for. By encasing a powerful centrifugal fan inside a box lined with high-density acoustic foam, it traps the mechanical noise while delivering a massive 2500 m³/h airflow. It turns a chaotic, noisy environment into a smooth, silent operation, giving you total control over your environment and your peace of mind.

What it feels like to grow with the Metal Tornado

Switching to a soundproof box like the Metal Tornado changes the entire vibe of your grow room. Physically, you'll notice the temperature drop and stabilize immediately. The air feels crisp and fresh because you are finally moving enough volume to replenish the CO2 your plants crave. That heavy, stagnant feeling disappears, replaced by a constant, gentle breeze that strengthens your plants' stems.

Emotionally, it’s a relief. You can stand right next to the box and have a normal conversation without shouting. The vibration is minimal, and the "whoosh" of air is far more pleasant than the mechanical whine of cheaper fans. It gives you that "pro grower" confidence, knowing your Air Extraction System is robust enough to handle even the hottest summer days without breaking a sweat.

How to squeeze the experience to the max

To get the absolute best performance out of this 2500 m³/h beast, you need to set it up correctly. Here are a few pro tips to optimize your ventilation:

• Use Sono-Connect Ducting: Don't ruin the silence by using standard aluminum tubes. Use acoustic ducting to dampen the noise of the air rushing through the pipes.
• Hang it, don't place it: Suspend the box using rubber bungees or chains to prevent vibrations from transferring to the floor or ceiling.
• Match the Filter: Ensure your Odor eliminator for weed (carbon filter) has a capacity slightly higher than 2500 m³/h to avoid strangling the motor.
• Check the Flange: This unit has a 355mm mouth. Make sure all your connections and clamps match this size to prevent air leaks.
• Fan Controller: Pair it with a voltage controller to dial down the speed during the night or winter, making it even quieter.

Advantages and benefits in your day-to-day life

• Stealth Mode: The acoustic foam lining absorbs motor noise, keeping your operation discreet and neighbor-friendly.
• Built to Last: The galvanized metal casing protects against rust and physical damage, ensuring years of service in humid grow environments.
• Reliable Power: The Torin-Sifan motor is an industry standard for reliability, meaning no unexpected failures mid-flower.
• Massive Airflow: With 2500 m³/h, you can effectively cool large spaces (approx. 4.5m x 4m x 2.5m), preventing heat stress and mold.
• Versatile Installation: The cubic shape makes it easy to stack or hang in tight corners of your grow room.

How it fits with other products in your set-up

The Metal Tornado is the heart of your ventilation system, but it needs a team. It pairs perfectly with high-capacity carbon filters to scrub the air before it leaves the room. If you are running high-wattage HPS or multiple LED fixtures, this extractor is essential to remove the heat they generate.

It also works seamlessly with climate controllers. By automating the fan speed based on temperature probes, you create a "smart" grow room that adjusts itself, saving you electricity and keeping conditions stable 24/7.

Frequently Asked Questions

Is the Metal Tornado completely silent?

No fan is 100% silent because moving air creates sound. However, the Metal Tornado eliminates the mechanical motor noise. If you use acoustic ducting, the only thing you will hear is a soft rushing of air, which is significantly quieter than standard fans.

What size grow room is this for?

With 2500 m³/h, this unit is ideal for a room volume of approximately 83 m³. For example, a room measuring 4.5m x 4m x 2.5m. It ensures the air is renewed roughly 30 times per hour.

Does it come with a plug?

These professional industrial units often come ready to be wired. You may need to connect a standard power cable (plug & play) depending on your specific setup requirements. Always check the connections before powering on.

Can I use it with a speed controller?

Yes, the Torin motor works well with quality voltage controllers. This allows you to run the fan at 60-70% power for ultra-silent operation and ramp it up to 100% only when temperatures spike.

Personal Experience of Pevgrow’s CEO (Alan)

I remember upgrading to my first metal box extractor when I moved from a tent to a full room setup. The difference was night and day. With the Metal Tornado 2500, the first thing you notice is the build quality—it feels like a tank. I used this specific model in a setup with four 600W lights, and it kept the temps at a perfect 24°C without sounding like a factory.

A trick I learned: use oversized ducting if you can reduce it down later. Keeping the airflow smooth right out of the 355mm mouth reduces turbulence noise significantly. If you are serious about yield and discretion, this investment pays for itself in one harvest.