Aqua Medic Arctic Breeze 6-Pack Fan (Pond Cooling Fan) High-performance fan made of aluminum and plastic for heat dissipation. For cooling pond water by increasing evaporation. - Brushless silent motors for increased fan lifespan - Low voltage 12 volts - Low power consumption thanks to the adjustable power supply (3 - 12 volts) - Adjustable fan capacity up to 94 m³/hour volume speed For temperature-based control, we recommend using our T twin controller (sold separately). Arctic Breeze 6-Pack: Approximately 40 × 4 × 15 cm (Length × Width × Height)