This is the air we breathe! "Just open the window". It's a common 'solution' in kitchens, bedrooms, offices and classrooms. But to tell you the truth, it doesn't do the job. Cracking the window in an office where the air feels suspiciously stuffy by 10 am doesn't fix your problem and is definitely not practical. Cracking open a window is not a ventilation strategy; it's a quick fix (and a guaranteed complaint from whoever's parked nearest to the window). Opening the windows d