Vents - TT Pro 250 Un Mixed-Flow Inline Fan Ø250 mm with Controller and Sensor

250 mm inline fan with a mixed-flow impeller, built-in speed controller and temperature sensor. Moves up to 1400 m³ per hour at 51 dB(A) at three metres and weighs 7.8 kg.

The TT Pro 250 Un is the largest size of Vents' TT Pro series we sell. Compared with the standard TT, the Pro has a housing of flame-retardant polypropylene and an impeller that builds more pressure. The Un version controls itself by temperature.

Controller with temperature sensor

The Un version has a speed controller with an electronic thermostat built into the housing and a separate temperature sensor on a 4 metre cable. Place the sensor where it matters, for example at the top of the grow room. Use the knobs on the fan to set the base speed and the target temperature. When it gets warmer than set, the fan switches to full power. When the temperature drops again, it returns to the set speed. So you don't need a separate controller or thermostat.

The fan comes with cable and plug: connect it, hang the sensor and set it up.

Construction and maintenance

The motor runs on ball bearings and has thermal protection. The fan is IPX4, can be mounted in any position and moves air up to 60 °C. The motor section with impeller comes out of the housing without disconnecting the ducts. Clean the impeller at every crop change: dust costs airflow and causes imbalance.

Technical Specifications:

• Power consumption: 125 W to 177 W
• Current: 0.54 A to 0.79 A
• Connection size: 250 mm
• Airflow: 1110 to 1400 m³ per hour
• Noise level: 44 to 51 dB(A), measured at three metres
• Control: built-in speed controller with electronic thermostat
• Temperature sensor: external, on a 4 m cable
• Plug: cable with plug included
• Housing: polypropylene, flame-retardant
• Bearings: ball bearings
• Protection rating: IPX4
• Air temperature: up to 60 °C
• Weight: 7.8 kg
• Mounting: any position

Frequently asked questions

What is the difference with the TT Pro 250 RV?
The RV only has a switch for low and high. The Un controls steplessly and switches by temperature itself. Motor, airflow and housing are the same.

Where do I hang the sensor?
Where you want to monitor the temperature, usually at the top of the room where heat builds up. Not directly in the airflow or under a lamp.