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20″ Weather-Shield® Premium Box Fan Plus

Model 3743

With a high-performance grill for ultimae airflow and a patented Weather-Shield® motor for worry-free window use, this box fan from Lasko is truly premium. Also features 3 quiet speeds, Save-Smart® (costs less than 2¢ per hour to operate), a 2-year limited warranty, and a built-in carry handle.

Watch a video to learn how to properly assemble the stabilizer feet for this box fan.


  • Patented Weather-Shield® motor for worry-free window use
  • Built-in carry handle
  • 2-year limited warranty
  • Save-Smart®--less than 2¢ per hour to operate
  • High performance grill for ultimate air flow
  • 3 quiet speeds
  • Made in the USA from domestic & imported parts
  • The Blue Plug™ Patented safety fuse technology
  • Simple no-tools assembly
  • E.T.L. listed


  • Size/Height: 21.38"L x 4.5"W x 22.75"H
  • Weight: 10.87 lbs
  • Remote: No
  • Controls: Manual controls