Accessibility and barrier-free design notwithstanding, the North American Fenestration Standard (NAFS), referenced in the 2010 National Building Code of Canada (NBC), sets different operating force limits for standard CW and AW Performance Class windows....

Accessibility to fresh air and a connection to the outdoors for those with physical disabilities are especially important in skilled nursing and personal care facilities, multi-family dwellings, and hotels, along with classrooms and dormitories....