Opening the garage door is an obvious way to bring in fresh air. But if you’re concerned about bugs, debris, or neighborhood pets, consider adding a screen door.
Some garage screen doors slide on tracks and stack on either side. You can still drive into both bays of a two-car garage, but you have to move the doors. Other sliding doors pull down like window shades (see above) from a cassette mounted at the top of the door opening.

Turn your garage into an outdoor room with the addition of a garage screen door.
Roll-up screens are a third option. The screen hangs from hook-and-loop material and includes zippered openings so you can walk in and out while the screen is down. When you don’t need the screen, you just roll it up.