Be ready to point this out to the front desk staff and request an alternate room if available or have the hotel provide an air cleaner unit, which many hotels have on hand unbeknownst to guests.

CNN: Business travelers, avoid these rooms

Not good enough, says Hogan, who issued a request for proposals for an alternate measurement system in May, and says he expects to have more than 20 for consideration by mid-December.

FORBES: Magazine Article

It required an expansion of the time period to review the request, as would be appropriate because it was an alternate route -- an alternate route that, as far as I know, still has yet to be identified.

WHITEHOUSE: Press Briefing