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Pressure Relationships
Animation Series 2:
Pressure Relationships
Balanced Flows are Precarious
Mouse over the animated picture above to see messages which are referenced in more detail below.
Pressure relationships between rooms is designated at the bottom of each room (with a plus for positive and minus for negative pressure).
- [KITCHEN EXHAUST] Exhaust fans in the kitchen are on manual switch. In the early morning and late afternoon hours, a small set of exhaust fans are operating to accommodate
light cooking for lunch. This places the kitchen and cafeteria area under slight negative pressure that draws some transfer air from the office area.? What happens at noon?
- [COPY ROOM] The exhaust is maintaining a slight negative pressure which draws some transfer air from the office space during the early morning and late afternoon.
What happens during the lunch?
- [OFFICE SUPPLY] The office supply air flow is sufficient in the morning and late afternoon to keep the office under slight positive pressure relative to the copy room and kitchen. Neither copy room pollutants nor kitchen pollutants are entering the office area. All is well in the morning. What happens during the lunch?