virtual tour of plant engineeringspice.unc.edu/wp-content/uploads/2019/10/08-part2...2019/10/08 ·...
TRANSCRIPT
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Virtual Tour of Plant Engineering
William A. Rutala, Ph.D., M.P.H., C.I.C.Director, Statewide Program for Infection Control and Epidemiology and Professor of Medicine, University of
North Carolina at Chapel Hill, NC, USA Former Director, Hospital Epidemiology, Occupational Health
and Safety, UNC Health Care, Chapel Hill, NC
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SPECIAL HEALTHCARE SETTINGS(Airborne Infection Isolation-AII)
Planning new or renovating AII units Directed airflow: exhaust air to the outside, away from air-
intake and populated areas (IC)
Well-sealed room (IB)
Room-air pressure: Maintain continuous negative room with respect to corridor; monitor air pressure periodically (IB).; install self-closing doors (IC)
Room-air changes: Maintain at >12 per hour (IB)
Calculate Air Changes Per Hour
To calculate room air changes, measure the supply airflow into a room, multiply the CFM times 60 minutes per hour. Then divide by the volume of the room in cubic feet (just changing CFM into Cubic Feet per Hour (CFH).
For example, 200 CFM x 60 m/h =12,000 CFH
If room is 12 ft x 10 ft x 10 ft =1200 cubic feet
12,000 CFH/1200 CF = 10 AC/hour
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Environmental Infection Control for Special Health Care Settings
Environmental Infection Control for Special Health Care Settings
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Environmental Infection Control for Special Health Care Settings
Minimum Efficiency Reporting Value
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Minimum Efficiency Reporting Value
Heating, Ventilation and Air ConditioningMERV 8 (30-35% in 3-10u)
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Heating, Ventilation and Air ConditioningMERV 8 (30-35% in 3-10u)
Heating, Ventilation and Air ConditioningMERV 11 (60-65% in 1-3u)
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Heating, Ventilation and Air ConditioningHEPA (High Efficiency Particulate Air)
Heating, Ventilation and Air ConditioningActivated Carbon Filter-removes organic compounds and odors
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Heating, Ventilation and Air ConditioningMERV 14 (90-95% in 0.3-1u)
Heating, Ventilation and Air ConditioningFour HVAC Systems In Cancer Hospital
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Heating, Ventilation and Air ConditioningSupply Air from Outside
Heating, Ventilation and Air ConditioningFilter Bank of MERV 8
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Heating, Ventilation and Air ConditioningRemoval of MERV 8 from Filter Bank
Heating, Ventilation and Air ConditioningAir from Patient Rooms Recirculated
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Heating, Ventilation and Air ConditioningReturn Air Hits Wall and Directed to Filters
Heating, Ventilation and Air ConditioningReturn Air with Diffusion Screen and MERV 11
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Heating, Ventilation and Air ConditioningMERV 11 with Activated Carbon Filter
Heating, Ventilation and Air ConditioningMagnehelic Gauge Used to Measure Pressure Differential
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Heating, Ventilation and Air ConditioningFiltered Air is Conditioned
Heating, Ventilation and Air ConditioningFiltered Air is Conditioned
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Heating, Ventilation and Air ConditioningFiltered Air is Conditioned (Cooled) Causing Condensate with Antimicrobial Tablets
Heating, Ventilation and Air ConditioningFiltered Air is Conditioned (Cooled) Causing Condensate with Antimicrobial Tablets
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Heating, Ventilation and Air ConditioningSupply Fan
Heating, Ventilation and Air ConditioningRoughing Filter with MERV 14
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Heating, Ventilation and Air ConditioningBack Side of MERV 14 with Humidification Rods
Heating, Ventilation and Air ConditioningFiltered and Conditioned Air Supplied to Patient Rooms
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Heating, Ventilation and Air ConditioningSupply Air to Hospital Patient Rooms
Heating, Ventilation and Air ConditioningExhaust Fans on Roof
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Thank you