Subject: Can positive air pressure have a negative effect on humans?

I realize this is a medical oriented question, however I'd appreciate it if you 
could tell me where I could find an answer to this question. I work in a 
healthcare facility. The air flow throughout the building is about 4 times 
higher than what would be typical. The reason this is done is to keep the air 
fresh. There is never any urine odor which is what would be expected in a 
facility such as this. However, quite a few staff feel a sense of irritability 
which creates many interpersonal problems resulting in low morale. When leaving 
the building one feels a sense of relief, like a weight has been lifted. I'm 
curious if long term exposure to higher than normal air pressure levels could 
be contributing to this problem. I'd appreciate any help you can provide me.

Re: Can positive air pressure have a negative effect on humans?