Lasko Weather-Shield Performance Box Fan User Manual

Important Safety Instructions

Please read all instructions carefully before using this fan. Failure to follow these instructions may result in electric shock, fire, or injury.

• Always unplug the fan before cleaning, servicing, or moving it.
• Do not operate any fan with a damaged cord or plug. Discard fan or return to an authorized service facility for examination and/or repair.
• Do not run cord under carpeting. Do not cover cord with throw rugs, runners, or similar coverings. Arrange cord away from traffic area and where it will not be tripped over.
• This fan is intended for indoor use only. Do not use outdoors.
• Do not insert or allow fingers or foreign objects to enter any ventilation or exhaust opening as this may cause an electric shock or fire, or damage the fan.
• To prevent a possible fire, do not block air intakes or exhaust in any manner. Do not use on soft surfaces, like a bed, where openings may become blocked.
• This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Product Overview

The Lasko Weather-Shield Performance Box Fan (Model 3720) is designed to provide powerful and efficient airflow for various indoor environments. Its innovative design and features ensure optimal cooling and air circulation.

Front view of the Lasko Weather-Shield Performance Box Fan, showcasing its white grille and central Lasko logo.

Features

• 3 Quiet Speeds: Provides a cooling breeze suitable for bedrooms, living rooms, kitchens, or home offices.
• Save-Smart Efficiency: Operates for less than $0.02 per hour, offering energy-efficient cooling.
• Weather Shield Motor: Allows for worry-free use in an open window, protecting against minor rain.
• Innovative Wind Ring System: Increases air velocity by up to 30% without increasing power consumption, circulating more air than traditional fans.
• Simple No-Tools Assembly: Ready to use in seconds by simply attaching the stabilizing feet.
• Built-in Carry Handle: For easy portability.
• 5-Blade Design: Enhances airflow.
• Lightweight: Weighs only 10.17 lbs for easy movement.

The Lasko fan in an office setting, demonstrating its performance with 2000 CFM airflow and Save-Smart energy efficiency.

Visual representation of the fan's convenient features including 3 fan speeds, carry handle, 5-blade design, light weight, and no-tool assembly.

Setup

The Lasko Weather-Shield Performance Box Fan requires minimal assembly.

1. Remove the fan and all packaging materials from the box.
2. Locate the two stabilizing feet included in the packaging.
3. Align the stabilizing feet with the slots on the bottom of the fan.
4. Gently push and clip the feet into place until they are securely fastened. No tools are required.
5. Place the fan on a firm, level surface.

Operating Instructions

The fan features simple, top-mounted controls for easy operation.

1. Ensure the fan is placed on a stable surface and plugged into a standard 120V AC electrical outlet.
2. Locate the control knob on the top of the fan.
3. Turn the knob to select your desired speed setting:
   • OFF: Turns the fan off.
   • 1 (Low): For gentle air circulation and quiet operation.
   • 2 (Medium): For moderate airflow.
   • 3 (High): For maximum air velocity and cooling.
4. To turn the fan off, rotate the knob back to the "OFF" position.

A close-up view of the fan's top-mounted control knob, indicating Fan On/Off and Speed Adjustment functions.

Maintenance

Regular cleaning helps maintain the fan's performance and extends its lifespan.

• Always unplug the fan from the power outlet before cleaning.
• Use a soft cloth to gently wipe down the exterior surfaces of the fan.
• For dust accumulation on the grilles, use a vacuum cleaner with a brush attachment to remove dust from the air intake and exhaust areas.
• Do not immerse the fan in water or allow water to drip into the motor housing.
• Do not use gasoline, benzene, thinner, or other harsh chemicals to clean the fan, as these may damage the finish.
• Store the fan in a cool, dry place when not in use.

Troubleshooting

If your fan is not operating as expected, please refer to the following common issues and solutions:

If the problem persists after trying these solutions, please contact Lasko Customer Support for assistance.

Specifications

Warranty and Support

The Lasko Weather-Shield Performance Box Fan (Model 3720) comes with a 2-year limited warranty from the date of purchase. This warranty covers defects in material or workmanship under normal use.

For warranty claims, technical support, or any questions not covered in this manual, please contact Lasko Customer Support.

You can also refer to the official User Guide PDF for more detailed information: Download User Guide (PDF)