Week 3 - Indoor environmental quality & pollution treatment Flashcards
1
Q
What are the attributes of indoor environmental quality?
A
- EQ Prerequisite
– Indoor Air Quality
– Ventilation
– Thermal Comfort
– Lighting Quality
– Acoustics and Noise
– Hygiene
– Security
– Building Amenity
2
Q
What are some treatments for indoor pollutants?
A
- Mechanical ventilation & aircon system
- Architectural design and occupation
- Selection of building/furnishing
- Other related areas
3
Q
What impact does IEQ have on people?
A
- Usually “built tight”
- Impact productivity
- Sick building syndrome (SBS)
- Building related illnesses (BRI)
4
Q
What is sick building syndrome?
A
- Traditional sick symptoms in people (coughing, headache, fatigue, flu-like symptoms)
- Appear often in airconed buildings more than naturally ones
- Disappear when person leaves building usually
5
Q
What are building related illnesses?
A
- Clinically diagnosed illnesses associated with indoor air pollutants
- Allergic reactions & infectious diseases
- Long-term cancer risk
6
Q
What are the attributes of IEQ?
A
- Security
- Building amenities
- Indoor air quality
- Ventilation
- Thermal comfort
- Lighting quality
- Acoustics and noise
- Hygiene
7
Q
What is the minimum ventilation performance?
A
- Min quality and quantity of outdoor air supplied into building
- Controls odors
- Maintains CO2 levels
- Control of indoor pollutants
- Compliance with ASHRAE Standard 62
- Air pollutants (co, nitrogen dioxide, ozone, Respirable Suspended Particulate (PM10)) must conform to good air quality of IAQ Certification Scheme for offices and public spaces
8
Q
What are the attributes and factors for determining appropriate IAQ standards?
A
- Duration of exposure (different depending on different places (old people, children, sedentary work, industrial work)
- Advocated by IAQ certification scheme———
- Excellent Class & Good class
- Goes really into detail, different for different people and different specific chemicals in the air
- Things that can impact—————–
- outdoor pollutants
- building materials
- interior finishes
- appliances
- consumer products
- occupants and what they do
9
Q
What are some specific chemicals to look out for?
A
- Formaldehyde (come from cleaning materials)
- Carbon monoxide
- Respirable Suspended Particulate (PM10)
- Nitrous Oxide
- Carbon dioxide
- VOC (Volatile Organic Compounds) (from building materials
- Radon
- Bacteria (airborne)
- Mold
10
Q
What does the IEQ require in terms of ventilation?
A
- TOP pre-requisite
- Should have indoor air distribution, esp in breathing zone (designs: mixed ventilation (ceiling), displacement ventilation (floor), stratum ventilation (beathing zone))
- Has to have—————–
- background ventilation (dilute contaminants)
- local exhaust (remove contaminants esp from toilets and kitchens where concentrated sources are expected)
- source control (isolate sources of pollution)
11
Q
What does good IEQ require in terms of thermal comfort?
A
- Aircon is being upped nowadays for energy saving
- Dependent on building type and use
- 6 primary factors ——————-
- dry bulb temperature
- relative humidity
- air speed
- mean radiant temp
- clothing insulation of occupant
- activity level of occupant
12
Q
What does good IEQ require in terms of lighting quality?
A
- Difficult in hong kong (dense)
- Dayligh should be encouraged in architactural design due to discomfort and drop in working efficiency otherwise
- Glare control also required
- Luminance on horizontal and pertical place
- Interior lighting for productivity
13
Q
What does good IEQ require in terms of noise?
A
- Needs to be at a certain level for comfort and speech intelligibility
- Background noise from: inside surrounding environment and produced by building
- Noise criteria level (NC level)
- Ground transportation and roads –> need suitable building facade and sound insulation
14
Q
What does good IEQ require in terms of hygiene?
A
- Scrope of control————
- Plumbing and drainage
- Bio contamination
- Waste disposal facilities
- Control ——————————-
- Water seal taps to “trap” sewer gas (swervy pipes)
- Appropriate plumbing and drainage systems (flushing, venting, maintanence)
15
Q
What does good IEQ require in terms of security?
A
- Personal safety and concerns in public areas
- Implemented through access control, surveillance, security of building openings, and layout
- 3 strategies —————————
- Natural and architectural barriers
- Human security
- Electronic security
