Ever heard of a box roof vent? You've probably seen one even if you didn't know its name. Here's what it is, how it works.

Q. What are the pros and cons re: roof ridge vs. side vents on a home? I have a condo which has side vents at the top of the condo’s two side peaks and there are small vents under the outside ...

When damage like this is happening on one side of the plant, the place to start is to look for clues related to that side, such as possible herbicide drift, or in your case, hot air from a dryer vent.