VGBC Online Series phần 8: Sức khoẻ và Tiện nghi trong Công trình xanh

1
Identify the intent, requirements, and strategies
for success with Health and Comfort credits
2
Understand what the affective variables on
indoor environment are (Temperature, Humidity,
Lighting Acoustics, Air quality and Control
systems)
3
Recognize how credits address issues related to
improving indoor air quality by reducing sources
of contaminants

PrerequisitesandCredits
Indoor Smoking
Low-Emission Products
Ventilation for indoor air quality
Biophilic Design
Daylighting
External Views
Thermal Comfort
Acoustic Comfort

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To minimize the effect of passive smoking
HC – Prerequisite
Indoor Smoking

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WHENWHAT WHY HOWWHO
Prohibit smoking inside
Including no-smoking policy under Building User’s
Guide (Man PR-2)
Post signage in areas frequently occupied by smokers

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WHENWHAT WHY HOWWHO
Install an outdoor designated smoking areas that is
located 8 meters away from building entrances,
outdoor intakes and operable windows

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WHENWHAT WHY HOWWHO
EXCEPTION
dwelling-units in Residential buildings
designated areas inside buildings listed in Decision
1315/QĐ-TTg. These designated areas must have a
separated ventilation system

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To minimize the negative impacts of hazardous materials such
as volatile organic compounds (VOCs) &
Formaldehydes from building materials
on occupant’s health.
HC – Prerequisite and Credit

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Prerequisite
Low-VOC paints and
coatings
HC – Prerequisite and Credit
Credit
The another Low-VOC
materials

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Eliminate the material off-gassing
WHENWHAT WHY HOWWHO

WHENWHAT WHY HOWWHO
Volatile organic compounds
(VOCs)
Effects: eye, nose, and throat irritation,
headaches, loss of coordination, nausea and
damage to the liver, kidney, and central
nervous system, some cause cancer
Sources: lacquers, paints, paint strippers,
building materials and furnishings, office
equipment, etc.
Formaldehyde
One of the 25 most abundantly produced
chemicals, highly toxic VOC
Sources: many construction materials,
furnitures and textiles. Eg, urea-
formaldehyde insulation foam and products
with pressed wood components.

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Material Categories
Interior paints and coatings
Interior adhesives and sealants
Flooring
Composite wood
Ceilings, walls, thermal, and acoustic insulation
WHENWHAT WHY HOWWHO
Furniture

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Demonstrate the low
VOC/Formaldehyde content certified
from international scheme
OR
Test reports from third party
laboratory or MSDS
(material safety data sheet)
WHENWHAT WHY HOWWHO

International Scheme Product
South Coast Air Quality Management District
(SCAQMD)
Adhesives, sealants, primers
Wood finishes, floor coatings
Green Seal
Aerosol adhesives
Architectural paints and coatings
Interior anti-corrosive and anti-rust paint
Green Label Plus
(Carpet and Rug Institute)
Carpets
Green Label
(Carpet and Rug Institute)
Carpet cushion
FloorScore Vinyl, linoleum, laminate, wood, ceramic, rubber flooring
GREENGUARD Furniture and seating
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WHENWHAT WHY HOWWHO

@VGBC
Working space in Green One UN House
Requirements for carpet
flooring for the Green One
UN House project:
▪ VOC limit: as low as
possible and a maximum
of 0.5 mg/m2
▪ Compliance
Environmental Classification
Scheme (by Carpet Institute
of Australia)
Case Study

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To maintain a good indoor air quality during occupancy.
HC – Credit
Ventilation for indoor air quality

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Determine the design strategies
for good air quality
Fresh Air Supply
Air Filtration
CO2-based demand-controlled ventilation
Ventilation in Wet Areas
WHENWHAT WHY HOWWHO

@VGBC IESVE
WHENWHAT WHY HOWWHO
Fresh Air Supply
of net occupied area
is provided a minimum fresh air supply
95%

Referenced
Standard
@VGBC
MECHANICALLY
VENTILATED SPACES
ASHRAE Standard
62.1-2010
TCVN 5687:2010
AS 1668.2

Referenced
Standard
@VGBC
NATURALLY
VENTILATED SPACES
QCVN 09:2017/BXD
ASHRAE Standard
62.1-2010

Design operable wall openings to promote natural ventilation
@VGBC Pou Chen Green World Kindergarten

minimum efficiency
reporting value (MERV)
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WHENWHAT WHY HOWWHO
Air Filtration
(with Fresh Air Supply)
16
(Hanoi)
14
(HCM)

@VGBC IESVE
WHENWHAT WHY HOWWHO
CO2-based demand-controlled ventilation
Densely occupied space
occupant density > 1 people
per 3 square meter

@VGBC IESVE
WHENWHAT WHY HOWWHO
Ventilation in Wet Areas
Exhaust Ventilation
in kitchen, bathroom and toilet

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To incorporate natural environment in the project to
nurture the human-nature relationship.
HC – Credit
Biophilic Design

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Encourage interaction,
recreation, and
physical activities
WHENWHAT WHY HOWWHO

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Determine minimum of open space area
for vegetation and outdoor activities
WHENWHAT WHY HOWWHO
total site area
shall be counted as open spaces
15%
at least

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WHENWHAT WHY HOWWHO
Provide interior plants and indoor water feature
Capital House - LOTUS

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Provide nature views to occupied area
and access to outdoor spaces
WHENWHAT WHY HOWWHO

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WHENWHAT WHY HOWWHO
Pay attention to shared open space
Designate open space features
Design open space physically accessible and
encourage use by occupants

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To encourage building designs which maximize
the use of daylight.
HC – Credit
Daylighting

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OR
Option
A
Daylight Factor
Option
B
Daylight Autonomy
HC – Credit
Daylighting

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Establish design criteria to determine
how to best orient the building
WHENWHAT WHY HOWWHO

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DESIGN TO MAXIMIZE DAYLIGHT
Skylights
Light shelves
Sun tubes
Larger window areas and
appropriate interior wall space planning
WHENWHAT WHY HOWWHO

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Provide operable glare
control devices
WHENWHAT WHY HOWWHO
Interior window
Blinds and shades
Curtains
Movable exterior louvers, screens, awnings

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OR
Option
A
Daylight Factor
Option
B
Daylight Autonomy
HC - Credit
Daylighting

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A daylight factor (DF) is the ratio of the light level inside a structure to the light
level outside the structure
▪ 0-2% DF is inadequately light and so electric lighting is required
▪ 2-5% DF is adequately light, but electric lighting may be required during some of the time
▪ >5% DF is a well-lit space and electric lighting should not be required during daytime periods. Glare
may be an issue
IESVE
WHENWHAT WHY HOWWHO

@VGBC
LOTUS Calculator – Daylight Factor
has a daylight factor between 1.5-3.5%
60%
at least
WHENWHAT WHY HOWWHO

@VGBC VietinBank Tower – LEED & LOTUS
Case Study

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Demonstrate the spatial daylight
autonomy SDA300/50%
WHENWHAT WHY HOWWHO
300 lux for 50% of hours 8am-6pm for a year

@VGBC IESVE
WHENWHAT WHY HOWWHO
Spatial Daylight Autonomy is the annual sufficiency of daylight levels in a space.
sDA examines the percentage of an analysis area (e.g. working plane) that meets a
minimum illuminance level

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Perform the annual sunlight
exposure (ASE1000,250) simulation
WHENWHAT WHY HOWWHO
1000 lux for more than 250 hours 8am-6pm for a year

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Annual Sunlight Exposure (ASE) describes how much of space receives too much
direct sunlight, which can cause glare or increase cooling loads.
LOTUS limits 10% of the working plane area to 1,000 lux for 250 hours per year
IESVE
WHENWHAT WHY HOWWHO

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To increase the occupants’ connection to the outdoors
by providing views to the exterior.
HC – Credit
External Views

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HC – Credit
External Views
AND
Strategy
A
External views
Strategy
B
Quality views

@VGBC IESVE
WHENWHAT WHY HOWWHO
and
Provide a direct line of sight to the outdoor environment
for at least 70% of the net occupied area
Provide a clear image of the exterior

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WHENWHAT WHY HOWWHO

@VGBC IESVE
WHENWHAT WHY HOWWHO
View Characteristics
Direct line of sight to the outdoors via vision glazing
Views that include flora, fauna, sky or movement
Unobstructed views located with 8 meters
from the exterior of the glazing
Multiple lines of sight to vision glazing in diﬀerent
directions at least 90 degrees apart

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Identify view type
for each area
WHENWHAT WHY HOWWHO

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LOTUS Calculator – External Views & Quality Views
has achieved the requirement
70%
at least
Note: a daylight factor (DF) is the ratio of the light level inside a structure to the light level outside the structure
WHENWHAT WHY HOWWHO

@VGBC
External views – VietinBank Tower
Case Study

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To encourage designs which achieve comfortable
thermal conditions for occupants.
HC – Credit
Thermal Comfort

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Design the building to avoid
overheating under hot summer
conditions in a occupied spaces
WHENWHAT WHY HOWWHO

Referenced
Standard
@VGBC
QD-3733-BYT:2002
standard for microclimates
in the workplace
TCXDVN 306:2004
standard for the
microclimate in residential
and non-residential
buildings

Referenced
Standard
@VGBC
ASHRAE 55-2010
Thermal Environmental
Conditions for Human
Occupancy
www.ashrae.org

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Factors directly affecting
thermal comfort
Surface temperature, air temperature
Air movement
Metabolic rate, clothing
WHENWHAT WHY HOWWHO
Humidity

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Determine the best conditioning
approach for the project
WHENWHAT WHY HOWWHO

Mechanical Conditioning
(considerations)
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WHENWHAT WHY HOWWHO
Effective building envelope
Properly sized efficient air-conditioning system
Appropriate thermal zoning

Natural Conditioning
(considerations)
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WHENWHAT WHY HOWWHO
Limit solar radiation and internal heat gain
Optimize daylighting
Enhance indoor air velocity using fans

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Case Study
Thermal comfort result for VietinBank Tower
project, submit for LEED IEQ Credit 7 and
LOTUS Thermal comfort H-6
Result shows 23°C and 50% humidity
(comfortable).

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Determine the best thermal
comfort controls
WHENWHAT WHY HOWWHO

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THERMAL CONTROLS
Thermostats
Ceiling fans
Adjustable underfloor diffusers
Task mounted controls
Operable windows
WHENWHAT WHY HOWWHO

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Conduct an comfort survey
during occupancy
WHENWHAT WHY HOWWHO

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To ensure a proper acoustic comfort within buildings.
HC – Credit
Acoustic Comfort

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HC – Credit
Acoustic Comfort
OR
Option
A
Internal Noise
Levels
Option
B
Noise absorption and
insulation

Referenced
Standard
@VGBC
TCXDVN 175 – 2005
Maximum permitted noise
levels in buildings
TCXDVN 277 – 2002
306:2004
Standard for noise insulation
of inner structures of non-
industrial buildings

@VGBC
Determine acoustic
design criteria
Building layout
Acoustic absorption and Sound Isolation
Reverberation Time
Quiet building services (ventilation, heating…)
WHENWHAT WHY HOWWHO

WHENWHAT WHY HOWWHO
Noise Level
Maximum allowable noise level
for public buildings (see Table H.12)
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WHENWHAT WHY HOWWHO
No room absorption with room absorption
Room absorption,
acoustic ductwork
Room absorption, acoustic
ductwork, false ceiling
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Minimize the noise level from systems

WHENWHAT WHY HOWWHO
@VGBC
The minimum requirements on sound insulation
for each sound class (see Table H.14 and H.15)
Noise Insulation

WHENWHAT WHY HOWWHO
A - Airborne: typically voice, radios, musical
instruments, traffic, aircraft
B -Impact: footsteps, noisy pipe, vibrating
machinery, slammed door, construction
@VGBC
Airborne Sound
refers to sources which produce
sound by directly setting the air
around them into vibration
Impact sound
refers to sources which produce
sound by impulsive mechanical
excitation of part of a building
(e.g. by footsteps, electric light
switches, slamming doors).
Many sources of impact sound
also produce significant levels
of airborne sound
ASHRAE

WHENWHAT WHY HOWWHO
@VGBC
Reverberation Time (RT) requirements
for each occupied space (see Table H.13)
Noise Absorption

WHENWHAT WHY HOWWHO
A reverberation is the overall effect of reflected sound and the time required for reflected
sound to become inaudible. The reverberation time of a room or space is defined as the
time it takes for sound to decay by 60dB
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KEY TERMS
CO2
monitoring
densely
occupied
breathing
zone
Tobacco
Smoke
Control
@VGBC
mechanical,
natural,
mixed-mode
ASHRAE 62.1
and 55
material off-
gassing
low-emittingMERV
thermal
comfort
noise
insulation
daylighting
noise
absorption
Particulate
Matter
acoustic
performance
quality view
glare control
thermal
control
open space
noise
level
demand-
controlled
ventilation
high density
occupied space
thermal
comfort
factors
reverberation
time

VIETNAM GREEN BUILDING COUNCIL
FOR FURTHER INFORMATION, PLEASE CONTACT:
LOTUS Certification: certification@vgbc.vn
Membership: long.dang@vgbc.vn
Education & Training: education@vgbc.vn
General enquiries: info@vgbc.vn or visit: www.vgbc.vn
Telephone: (+84) 868 166 526
Address: 8th floor, Hanoi Creative City Building, 1 Luong Yen, Hai Ba Trung, Ha Noi

VGBC Online Series phần 8: Sức khoẻ và Tiện nghi trong Công trình xanh

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VGBC Online Series phần 8: Sức khoẻ và Tiện nghi trong Công trình xanh