Positive Pressure 2 : Condition that exists when more air is supplied to a space than is exhausted, so the air pressure within that space is greater than that in surrounding areas
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}