Here are some answers to your concerns:
Q: What size of hole needs to be cut?
A: You will need to cut a 17.1'' x 17.1'' hole to place the fan before installation. Fans can be installed both inside and outside the walls.
Q: How to connect these wires inside the fan?
A: No assembly required. Complete kit includes the fan unit, the controller, corded sensor probe, and power it through an outlet.
|Air Volume||1513 CFM|
|Material||Aluminum Alloy, Powder-coated Steel|
|Voltage||EC 120 V / 60 Hz|
|Power Cord||5.6 ft / 1.7 m|
|Rotating Speed||1600 RPM|
|Weight||10.8 lbs / 4.9 kg|