Yep, the BLACK+DECKER 9" Dual Window Fan can do both intake and exhaust.
According to the manufacturer's description, you can flip it between pulling fresh air in or pushing stale air out. But keep in mind, both fans have to be in the same mode—they can't work in opposite directions at the same time.
So you can't have one bringing air in while the other pushes air out. Some folks have mentioned this was a bit of a letdown, especially if they wanted continuous air circulation. If that's a dealbreaker, you might want to check out other models that offer that feature.
But overall, people have said it does a good job of improving airflow and cooling, especially at night since it's pretty quiet.
For general ventilation, this fan should work well for you.
How we researched this
Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from 4 retailers, and a look at hundreds of user reviews to give you a well-rounded picture.
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