Fans And MosquitosA fan that blows air horizontally creates an air current too stiff for mosquitoes to handle – their flight speed maxes out at 2 miles per hour (a gentle breeze is about 10 mph). The wider the fan oscillates, the greater the area you can keep mosquito-free. Overhead fans are nice, but not as effective. Pro tip: add a second fan for more complete coverage and refreshment.