

20″ Power Plus Box Fan
Model 3721
Lasko’s 20″ Power Plus box fan features the powerful Weather-Shield® motor for worry-free window use. Its innovative Wind Ring® system is engineered to provide 30% more air velocity. A wider steel body offers greater stability and durability.
Features
- Patented Weather-Shield® motor for worry-free window use
- Built-in carry handle
- 2-year limited warranty
- Energy efficient operation
- Innovative Wind Ring® system for 30% more air velocity
- 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
Specifications
- Size/Height: 21.25"L x 4.75"W x 22.5"H
- Weight: 10.17 lbs
- Remote: No
- Controls: Manual controls