These “spinning things” are called Turbine Vents (AKA whirly birds). They are effective at venting hot attic air. They are usually used when there is no... | By RBJ Roofing | Facebook
![What is this black round thing on the roof of this transit company van? It was spinning fast. : r/whatisthisthing What is this black round thing on the roof of this transit company van? It was spinning fast. : r/whatisthisthing](https://external-preview.redd.it/srFjPkvF_1Ji90VF6xh2uEWiQfEW3sTHzsXHu4i0Kc0.jpg?auto=webp&s=bbc7ce94a0920ef3ec72d02f2f0a3219d97ddf21)
What is this black round thing on the roof of this transit company van? It was spinning fast. : r/whatisthisthing
![FLOWROTOR Midiflow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR MidiFlow Vent BLACK] - £52.99 Inc. VAT : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - FLOWROTOR Midiflow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR MidiFlow Vent BLACK] - £52.99 Inc. VAT : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents -](https://www.flowrotor.co.uk/images/frblack.jpg)
FLOWROTOR Midiflow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR MidiFlow Vent BLACK] - £52.99 Inc. VAT : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents -
![FLOWROTOR UltraFlow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR UltraFlow Black] - £52.99 Inc. VAT : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - Ducts - FLOWROTOR UltraFlow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR UltraFlow Black] - £52.99 Inc. VAT : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - Ducts -](https://www.flowrotor.co.uk/images/lowbk.jpg)
FLOWROTOR UltraFlow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR UltraFlow Black] - £52.99 Inc. VAT : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - Ducts -
![WHAT IS THAT SPINNING THING ON TOP OF THE NEW AMAZON PRIME STEP VAN/BOX TRUCK DELIVERY VEHICLE? - YouTube WHAT IS THAT SPINNING THING ON TOP OF THE NEW AMAZON PRIME STEP VAN/BOX TRUCK DELIVERY VEHICLE? - YouTube](https://i.ytimg.com/vi/QPjitwD73ws/maxresdefault.jpg)