To provide an overview of Indoor Air Quality including the various factors that can impact an office-type building.
3 Objective (Contd)
To familiarize participants with typical health complaints environmental measurements collection and remedial actions .
Building Related Illness-Diagnosable illness whose symptoms can be identified and whose cause can be be directly attributed to airborne building pollutants
(e.g. hypersensitivity pneumonitis or Legionnaires disease)
Sick Building Syndrome(Tight Building Syndrome) Used to describe situations in which building occupants experience acute health and /or comfort effects that appear to be linked to the time spent in a particular building.
No specific illness can be identified.
Complaints may be localized in a particular room zone or widespread throughout the building.
6 Four Elements of IAQ Dilemma
7 Sources Indoor Air Contaminants
Contaminated outdoor air
Emissions from nearby sources
Moisture or standing water promoting excessive microbial growth
8 Source of Indoor Air Contaminants
Building Components and Furnishings
Unsanitary conditions and water damage
Chemicals released by building components
9 HVAC SYSTEM DESIGN AND OPERATION
Provides thermal comfort.
Distributes adequate amounts of outdoor air.
Isolates and removes odors and contaminants through pressure control filtration and exhaust fans
10 Targeted groups of IAQ Dilemma
Allergic or asthmatic individuals.
People with respiratory disease.
People whose immune system are suppressed due to chemotherapy radiation therapy disease or other causes.
Contact lens wearers.
11 Component of a HVAC System
Mixed-air plenum and outdoor air control
Heating and cooling coils
Humidification and dehumidification equipment
Return air system
Exhaust or relief fans and air outlet
Self-contained heating or cooling unit
12 Types of Symptoms and Complaints
Shortness of breath
Eye nose and throat irritation
13 Conducting and IAQ Investigation
Collect and Review Existing Records
Conduct a Walkthrough Inspection
Collect Detailed Information
14 Instruments and Methodology Used for IAQ
Thermal Comfort-Temperature Relative Humidity
Tracking Air Movement with Chemical Smoke
CO2 as a indicator of good ventilation.
Estimating Outdoor Air Quantities
15 Instruments and Methodology Used for IAQ
Air Contaminant Concentrations
16 Regulatory Requirements
OSHA-General Duty Clause
ASHSHARE 62-1999 Ventilation for Acceptable Indoor Air Quality
A healthy indoor environment is one which the surroundings contribute to the productivity comfort and sense of health and well being.
A healthy environment may be achieved by proper building maintenance and communication.
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