Overview
Ventilation systems supply and remove air to/from buildings and other structures. In doing so, these systems control the quality of breathing air and protect personnel and sensitive equipment from potentially hazardous airborne contaminants, fires, explosions, and excessive heat/cold.
Ventilation systems include a supply, or makeup air system and an exhaust system. Supply systems replace contaminated air exhausted from a workspace with uncontaminated outside air. Supply ventilations systems also provide replenishment air to air conditioning recirculation systems. Exhaust systems remove odors, heated air, and airborne contaminants from the workspace. Both supply and exhaust airflow quantities must be balanced.
All components of ventilation systems such as fans, motors, ducts, dampers, air intakes and outlets, filters, and access panels, must work properly in order for the systems to operate safely and efficiently. Therefore, ventilation system design must be considered as an essential part of the planning and development of a new facility. Failure to provide effective ventilation systems in the design stage can create costly obstacles to safe and efficient operation, which ultimately presents a threat to personnel safety and health.
This 5-hr course covers the basics of ventilation systems and will familiarize the reader with the mechanism of infiltration, exhaust ventilation and forced ventilation systems.
The course material is based entirely on US Corps of Engineers Construction Engineering Research Laboratory (USACERL) technical report 99/20, May 1999, Appendix D – Ventilation Systems.
The student must take a multiple-choice quiz consisting of twenty-five (25) questions at the end of this course to obtain PDH credits.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- What is natural ventilation and what factors determine building porosity
- How to calculate infiltration using air change method, crack method, curtain wall method and stack effect method
- What are the design considerations for forced ventilation systems
- How are constant air volume ventilation systems different from variable air volume systems
- What are the appropriate applications of airfoil, backward-curved, radial blade and forward-curved fans
- What are the design principles and methods for air distribution ducts
- What are the different types of air cleaners and air filters used for ventilation purposes
- What are the common types of exhaust hoods and what factors determine the effective removal of contaminants
- How do automatic control systems function and how is economy cycle operation achieved
- What are the basic methods and procedures for testing, adjusting and balancing (TAB) of ventilation systems
Course
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
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