Basic Documentation
Table Of Contents
- About this Application Guide
- Chapter 1–Introduction
- Chapter 2–Goals of the Laboratory Environment
- Chapter 3–Unique Ventilation Needs of a Laboratory Facility
- Chapter 4–Ventilation Systems Classification
- Chapter 5–Laboratory Facility Exhaust Systems
- Chapter 6–Laboratory Containment Units - Ventilation
- Chapter 7–Room Ventilation, Makeup Air, and Pressurization Control Systems
- Chapter 8–Laboratory Temperature and Humidity Control Systems
- Chapter 9–Laboratory Emergencies - Ventilation System Response
- Chapter 10–Laboratory Ventilation System - Validation
- Chapter 11–Laboratory Ventilation System - Commissioning
- Glossary
- Index
Chapter 5–Laboratory Facility Exhaust Systems
CONTROLLER
OUTSIDE AIR
BYPASS DAMPER
STATIC PRESSURE SENSOR
ISOLATION
DAMPER
MOTOR
STARTER
AIRFLOW
PROOF
SWITCH
ROOF
EXHAUST
PLENUM
LABORATORY
EXHAUST
Figure 5. Central Exhaust System Static Pressure Control Arrangement with Multiple
Constant Volume Fans Discharging into a Single Exhaust Stack.
Utilizing variable air volume ventilation systems provides an advantage since the
system control provisions automatically vary supply and exhaust ventilation airflow
rates in response to the various needs of a laboratory facility. Although VAV control
systems will automatically adjust supply and exhaust airflow’s, the exhaust system
static pressure must still be controlled within certain limits.
Without effective exhaust system static pressure control, major fluctuations in the
exhaust system static pressure would result in unsteady and unstable ventilation
system operation as the individual room supply and exhaust control provisions try to
maintain control over ever changing conditions.
26 Siemens Building Technologies, Inc.