This unit is ideal for venting cabinets and enclosures with limited space. The unit is self-contained and features a top-quality brushless fan for low noise and long life. The fan unit can be configured to pull air out of a cabinet (default configuration), or push air into the cabinet by easily reversing the fan. The unit is very easily installed and is powered with DC voltage and when used with our Universal Power Supplies, can be run silently or more aggressively depending on the application.