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20″ Weather-Shield® Select Box Fan with Thermostat

Model B20570

Lasko’s Weather-Shield® Select 20″ Box Fan features an adjustable thermostat to turn the fan on or off automatically. The Ultra Performance grill design provides up to 20% more airflow. Three energy-efficient speeds and the Weather-Shield® motor for worry-free window use.


  • Patented isolated Weather-Shield® motor for worry-free window use
  • Built-in carry handle
  • Ultra Performance grill design up to 20% more air flow
  • 3 energy-efficient 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: 22.5"L x 4.5"W x 22.5"H
  • Weight: 10.17 lbs
  • Remote: No
  • Controls: Manual controls
  • Thermostat: Adjustable thermostat turns fan on or off automatically