2. 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"

3. Win Tai Food Processing Factory Tai Po Industrial Estate, HK Pest-free exit

4. Under floor ventilation

6. Perspiring, headache, restlessness and increase of heart rate Atmospheric CO 2 Level at Sea Front Sick Building Syndrome due to poor ventilation and increase of heart rate Good IAQ Excellent IAQ Yawning Threshold Dozing Threshold Long Term Effects: Building Ordinance Section 123 standard 1900 1960 2000 2010 2020 2030 260 300 360 400 450 500 ↑ 800 1000 1500 2000 2500 and above Hypertension, pains and aches Stomach acid/ulcer ……………………………………… .. ……………………………………… .. ……………………………………… .. Year CO 2 level 5 air-exchange per hour

7. Common Sick Building Syndrome

11. IAQ Initiative 2.0 IAQ Initiative 1.0

12. < 25.5°C Temperature Relative Humidity Carbon Dioxide Formaldehyde 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/m 3 (Avoid using radioactive material) Delete < 87 ppb < 261 ppb < 0.3 m/s < 0.2 m/s < 200 Bq/m 3 < 150 Bq/m 3 < 1000 cfu/m 3 < 500 cfu/m 3 < 24 ppb < 800 ppm 40 to 70 % 20 to 25.5°C < 1,000 ppm < 81 ppb HK Government “Indoor Air Quality Guidance Notes” Parameter Excellent Good HK Government “Indoor Air Quality Guidance Notes” Parameter Excellent Good

13. Outdoor Air Quality Trend of Hong Kong

16. Sampling point A Sampling point B

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

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

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