I. Scientific and Systematic Management of IAQ - for Building Service Professionals

II.The Importance of A Standard for IAQIII.Living in Harmony with Nature

IAQ Lecture Series

Speaker: Kee-Neng Wai, Ph.DDate: Oct 6, 2009Venue: Aedas Architects

Fallingwater, Bear Run, Pennsylvania (1939)

Frank Lloyd Wright

Johnson Wax Research Tower in Racine, Wisconsin (1951)

The design of the Research Tower consists of fourteen levels, seven of which are square plans with a circular mezzanine above. The central structural and circulation core accommodates the elevator and stairway channels as well as necessary ventilation and services. From the central core, the floor slabs are cantilevered out like branches of a tree. The entire outside surface is sheathed in glass tubes like the adjacent Administration Building to admit light without a view. The single reinforced concrete foundation for the central core is called the "tap root"

Win TaiFood Processing Factory

Tai Po Industrial Estate, HK

Pest-free exit

Under floor ventilation

Perspiring, headache, restlessness and increase of heart rate

Atmospheric CO2 Level at Sea Front

Sick Building Syndrome due to poor ventilation and increase of heart rate

Good IAQExcellent IAQ

Yawning Threshold Dozing Threshold

Long Term Effects:

Building Ordinance Section 123

standard190019602000201020202030

260300360400

450500↑

8001000

150020002500

and above

Hypertension, pains and aches Stomach acid/ulcer

………………………………………..

………………………………………..

………………………………………..

Year CO2 level

5 air-exchange per hour

Common Sick Building Syndrome

Chicago LandmarkTo Reduce Energy 80%

CHICAGO – Sears Tower, that bronze-black monument that forms the 110-story peak of the skyline here and stands as the tallest office building in the Western Hemisphere, has a new name and will soon have another new feature: rooftop wind turbines.

The building’s owners say the turbines are part of a $350 million retrofit of the 1970s-era modernist building now named Willis Tower. The plan is to reduce electricity use by 80% over five years through upgrades in the glass exterior, internal lighting, heating, cooling and elevator systems.

With 4.5 million ft2 (418, 000m2) of office and retail space, 16,000 windows and 104 elevators, the project is bound to be one of the most substantial green renovations ever tried on one site, planners said. Willis Tower is significantly larger than the 102-story, 2.6million ft2 (242, 000m2) Empire State Building, which is also undergoing renovation to reduce energy consumption.

“If we can take care of one building that size, it has a huge impact on society,” said Adrian Smith, an architect whose firm designed the renovation. “It is a village in and of itself.”

Source from: ASHRAE JOURNAL August 2009

IAQ Initiative 2.0

IAQ Initiative 1.0

HK Government “Indoor Air Quality Guidance Notes”

Parameter Excellent Good

HK Government “Indoor Air Quality Guidance Notes”

Parameter Excellent Good

< 25.5°CTemperature

Relative Humidity

Carbon DioxideFormaldehyde

Air Movement

TVOC

Radon

Airborne Bacteria

< 70 %

My Recommendation

22.5 ± 2.5°C

55 ± 10%

< 1,200 ppm

< 80 ppb + caution notes

My Recommendation

< 0.3 m/s (for comfort)

< 250 ppb (Standard)< 500 ppb (Week)< 1000 ppb (Day)< 200 Bq/m3 (Avoid using

radioactive material)

Delete

< 87 ppb < 261 ppb

< 0.3 m/s< 0.2 m/s

< 200 Bq/m3< 150 Bq/m3

< 1000 cfu/m3< 500 cfu/m3

< 24 ppb

< 800 ppm

40 to 70 %

20 to 25.5°C

< 1,000 ppm

< 81 ppb

Outdoor Air Quality Trend of Hong Kong

Q: How to deal with RSP and airborne bacteria problem and be in harmony with nature?

1) Capturing all sub-micron particles

2) Capturing all air-borne micro-organisms

3) Removal of Odour, e.g. tobacco smoke

4) Compact & light weight design

5) Energy saving & money saving

A: Electronic Air Cleaner

IAQ Center•Power and Energy

saving•Trouble shooting•Remedial Action•Legislations•Data Archive•Certification

Sampling point A

Sampling point B

Comparison of two IAQ(5P, 48H) Profiles taken at Sampling Points A & B

Comparison of two IAQ(5P, 48H) Profiles taken at Sampling Points A & B

Comparison of two IAQ(5P, 48H) Profiles taken at Sampling Points A & B