[Hugh R]

I'm at an industrial hygiene conference, and yesterday, I attended a session where they correlated formaldhyde gas build up in new homes with ventilation. With new LEED certified houses (very tight houses with respect to ventilation, they found high levels of formaldhyde (like 100 to 200 ppb), CA recommends no higher than 7 ppb. Not such a big deal with older homes, but bottom line the more open windows the better.