Review on 🌬️ Adjustable Air Vent Deflectors (4 PK, 4.3 Inch x 10-14 Inch) - Redirect AC Heat Efficiently! by Cory Miles

This is the best! They are very easy to install and serve their purpose perfectly. By installing two ceiling fans, we immediately noticed a difference in airflow and circulation. The advantage is that they are expandable and very easy to install. For other vent covers that direct airflow, many of them require screws to be removed from the vent openings. They stick to magnets, which is brilliant. They're not very strong, but as long as your vents aren't blowing gale force winds, they'll get the job done.