Indoor Air Quality

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Indoor air quality city statistics , health issues

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Occupational lung disease is number one work related illness. 13 million school days miss due to asthma, 24.5 million work days. EPA top 5 health risk. Preventable deaths

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AIQ stat buildings

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People spend 90% of time indoors. Edu percent buildings recently constructed or a modeled have IAQ complaints

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Increase exposure to indoor air quality problems

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Construction of more tightly sealed buildings. Reduce ventilation rates to save energy. Useless and thetic building materials and furnishings. Use of chemically formulated personal care products. Used to pass a size and cleaning supplies. And crease complex city of modern building systems. Building deterioration due to age, improper maintenance design

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Key factors for understanding indoor air quality

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Sources of indoor air pollutants. Heating ventilation and air conditioning systems. Put and pathways. Occupants

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Pollutants indoor versus outdoor

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Building related illnesses

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Legionnaires disease, asthma, Humidifier fever have been directly traced to specific building problems

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Sick building syndrome

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Dry or burning mucous membrane in the nose eyes and throat, sneezing stuffy or runny knows, fatigue, headaches, dizziness common Asha irritability and forgetfulness

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Common sources

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Radon

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Radon is naturally occurring radioactive gas and can be found in any home. Number one cause of lung cancer after cigarrette smoke. 21000 deaths a year. The EPA recommends every home because it for raid on

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Radon mitigation Basement

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Sub slab suction passive and active. Drain tile suction, sump hole suction, or block wall suction

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Radon mitigation crawl space

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Sub membrane suction. Crawl space depressurization or ventilation

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Radon mitigation. Other

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Sealing

House/room pressurization

Heat recovery ventilation

Natural ventilation

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Areas of concern for carbon monoxide poisoning

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Relative humidity psychometrics

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Seasonal humidity issues Indoors

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Particulate matter and bio aerosols

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Filtration mechanical

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Media and HEPA

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Filtration electrostatic percipitators ionizers and EAC

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Consideration, Ozone production, pressure drop, maintenance costs last period, effectiveness ratings

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Common indoor VO c's and sources

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The building Envelope

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Erema from areas of high pressure to areas of relatively lower pressure, infiltration of outdoor air is determined by pathways and pressure Differences . Designing negative pressure spaces and buildings smoking Kitchens bathrooms garages.