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Basic Ventilation

Basic Ventilation. Bureau of Workers’ Compensation PA Training for Health & Safety (PATHS). PPT-040-01. 1. To understand the basic concept of ventilation To understand reasons for ventilation To understand and apply proper ventilation techniques. Course Goals. PPT-040-01.

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Basic Ventilation

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  1. Basic Ventilation Bureau of Workers’ Compensation PA Training for Health & Safety (PATHS) PPT-040-01 1

  2. To understand the basic concept of ventilation • To understand reasons for ventilation • To understand and apply proper ventilation techniques Course Goals PPT-040-01 2

  3. Be able to define what ventilation is • Be able to apply ventilation to different applications • Be able to determine best method of ventilation • Be able to move air Student Objective PPT-040-01 3

  4. The process of "changing” or replacing air in any space to provide high quality indoor air • To: • Remove unpleasant smells and moisture • Introduce outside air • Improve circulation, etc. • In firefighting, refers to a tactic of creating a draft to control the release of heat and smoke Ventilation PPT-040-01 4

  5. To remove or control: • Hazardous/obnoxious odors • Smoke and smoke odor • Odors • Asbestos • Chemicals • Gases • Fumes • Particulates Reasons for Ventilation Burned Popcorn-Ugh! Note: There are specific requirements for certain contaminants that require specialized training and equipment PPT-040-01 5

  6. Vertical • Moving air up and out • Horizontal (lateral) • Moving air out through windows and doors Types of Ventilation PPT-040-01 6

  7. Mechanical/Forced • Fans • Cooling • Dilution • Exhaust • Circulation • Filtration • Scrubbers • Exhaust Systems • Chemical Methods of Ventilation PPT-040-01 7

  8. Natural • + No cost • Difficulty controlling • Increased time to utilize • Mechanical/Forced • + Easy to control direction • Need power source • Fumes • Cost How Air Moves PPT-040-01 8

  9. Never use gasoline powered fans inside a building, structure or confined space • Make sure fans are grounded • If a flammable atmosphere exists make sure fans are intrinsically safe (i.e. explosion proof) • Ensure area safe to set up equipment • Trip hazards – block off area, wires, fans Ventilation Safety PPT-040-01 9

  10. Determine: • What the problem is • Smoke, odor, chemical, etc. • Where it is located • What type of structure, building layout, occupancy • What is the cause or source • Origin of problem that needs ventilated • Is it safe for me • Main concern: can you do it safely without endangering yourself or others? Ventilation Steps PPT-040-01 10

  11. If unknown or dangerous: • Seek further assistance from Environmental Health & Safety (EHS) • Emergency services (either public or private contractors may be considered an option) • 911 • • If material can be identified and handled in a safe manner proceed to the next step • • Follow company policy Ventilation Steps PPT-040-01 11

  12. If you can start ventilation: • Determine where you are going to direct the flow of air • Avoid contaminating clean areas • Avoid directing into high occupancy area • Will it be a nuisance or hazard to anyone down wind? • If odors or other conditions are too strong, contact EHS for further evaluation Ventilation Steps PPT-040-01 12

  13. Check the corresponding Safety Data Sheet (SDS) for the product being ventilated • Review “Vapor Density” listed on SDS • Vapor Density = measure of a vapor’s weight when compared to air (air assigned value of 1) • Denser vapors tend to sink to floor level, less dense vapors tend to rise to ceiling level Vapors PPT-040-01 13

  14. Opening & closing doors • Opening & closing windows • Hanging plastic tarps in uncontaminated areas Directing Air Flow PPT-040-01 14

  15. A draft is better created with the flow coming in one direction and funneling out the opposite end • Closing additional doors or windows will increase the flow of air out of room/area • Additionally, remove any screens or curtains that may be in the way • Make sure the wind is not naturally coming in the way you intend to exhaust the odor Directing Flow PPT-040-01 15

  16. Close off open hallways or unaffected areas • Utilize plastic tarps or plastic sheets • Shower curtains with open hooks also work • Tension rods • Duct tape • To meet standards, some items will require top to be more sealed up to prevent additional contamination Directing Flow PPT-040-01 16

  17. How could you ventilate this area? Windows Let’s Ventilate Stairs Use Natural, Mechanical, Combination of both Doors Stairs Stairs PPT-040-01 17 PPT-040-01

  18. Asbestos • Asbestos training required • Do not disturb or enter • Required items: • Signage • Negative air machines • Air lock • Restricted entry • PPE (respiratory) Example of Stricter Requirements PPT-040-01 18

  19. Evaluate before allowing occupants (e.g. students, staff, etc.) to return • Senses may not be the best testing factor; may • depend upon what is being ventilated • ▪ Use meters if necessary • ▪ Utilize someone not on site previously (some items may desensitize your ability to smell them) Evaluate the Area PPT-040-01 19

  20. Ventilation is not difficult, but does take some thinking as to where to move contaminated air • Never move contaminated air into non-contaminated areas • If necessary, move occupants out of an area before ventilating • Determine the best method for effective ventilation • If material involved is hazardous, or you are not sure: stop and consult EHS for instructions Summary PPT-040-01 20

  21. Questions PPT-040-01 21

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