Is it dangerous if a window AC unit is not properly ventilated?
A friend has had a small room built into her garage that is meant to cool flowers. Since the space is very small, instead of using a normal floral cooler, she is using an air conditioning unit to cool the space. She cut a hole into the wall of the cooler to fit the air conditioner.
My concern is that this is a window air conditioner, and instead of being ventilated outside, the back of it just runs into the main part of the garage. Is this dangerous? I was in the garage for only a few minutes and felt like I was getting a headache from the stuffy air. I'm worried about my friend's health.
Thanks for your help.