The document discusses indoor air quality (IAQ) management and problem solving. It provides guidelines for various IAQ parameters like temperature, humidity, carbon dioxide levels and toxic gases. It also discusses problems related to exceeding these guidelines and their solutions, such as adjusting ventilation and air flow. Common IAQ issues like high humidity, carbon dioxide and formaldehyde levels are examined along with recommendations to address them through source removal, dilution and filtration. The importance of a scientific, technological and data-driven approach to IAQ management is emphasized.

1. I. Scientific and Systematic Management of IAQ II. The Importance of A Standard for IAQ III. In Harmony With Nature IV. Building Management of the 21 st Century V. Give Meaning to IAQ Management VI. Introduction to the Hinds IAQ Profile Monitoring System VII. Automatic IAQ Profile Monitoring Systems VIII. Automatic & Continuous Monitoring of IAQ IX. Problem Solving in IAQ Management X. Calibration (to be continued) IAQ Lecture Series

2. Hinds International (HK) Ltd. IAQ Lecture Series Speaker : Kee-Neng Wai, Ph.D Date : May 26, 2011 Venue : EMSD IX. Problem Solving in IAQ Management

6. IAQ Objectives Money Saved 節省金錢 II. Healthy Environment 健康工作環境 IV. Communication & Fair Trade 交流及公平交易 III. Problem Solving 解決問題 I. Energy Saving 節省能源 減少排放

7. Comfort Indicators Toxic Gases Carcinogens & BRI IAQ Guidelines ( 指標 ) Formaldehyde ppb <24 <81 Radon Bq/m 3 <150 <200 RSP (PM 10 ) µg/m 3 <20 <180 Airborne Bacteria cfu/m 3 <500 <1,000 Ozone ppb <25 <61 Nitrogen Dioxide ppb <21 <80 TVOC ppb <87 <261 Carbon Monoxide ppm <1.7 <8.7 Parameter Unit Excellent Good Temperature ºC 20 to 25.5 <25.5 Relative Humidity % 40 to 70 <70 Air Movement m/s <0.2 <0.3 Carbon Dioxide ppm <800 <1,000 Recommended NEW Guidelines 21 to 25 45 to 65 <0.3 <800/ <1,200 <100 <20/ <80 <100/ <300 <2.0/ <10 <100 <200 TD 2.5 Particle Numbers Delete

8. Comfort Factors 1. What is wrong with the 25.5 o C/70% RH condition? Answer : Mold and insect growth. 2. What change is needed for “Air Movement” Guidelines? Answer : One single guideline is needed. Solution : Change guidelines to 21 / 25 o C for Temperature 45 / 65% for Relative Humidity Parameter Unit Current Guidelines Recommendation Temperature ºC 20 to 25.5 < 25.5 21 to 25 Relative Humidity % 40 to 70 < 70 45 to 65 Air Movement m/s < 0.2 < 0.3 < 0.3 Carbon Dioxide ppm < 800 < 1,000 < 800 / < 1,200

13. Problems relating to CO2 level in IAQ 1. Problems : Health & work efficiency Energy cost and carbon footprint Global warming 2. Problems : Human factors and specific needs (Including laws, regulation and politics) Solution : Ventilation control Management with Fresh air intake database and Exhaust air control knowledge base Air flow pattern control - Optimization Solution : Management on database and knowledge base Professional and public recognition

14. Toxic Gases Problems : High concentration. Problem : What can we do when the outdoor level is higher than indoor level? Solution : Remove source of pollutant Dilution with fresh air Scrubbing & detoxification Isolate & exhaust Solution : Consult the professionals /or politicians Parameter Unit Current Guidelines Recommendation Ozone ppb < 25 < 61 <100 Nitrogen Dioxide ppb < 21 < 80 < 20 / < 80 TVOC ppb < 87 < 261 < 100 / < 300 Carbon Monoxide ppm < 1.7 < 8.7 < 2.0 / < 10

15. Outdoor Air Quality Trend of Hong Kong 8-Hr. Ave. IAQ Urban (320) Excellent (50) Rural (320) Good (120) 1-Hr. Ave. IAQ Urban (282) Excellent (40) Rural (119) Good (150) 1-Hr. Ave. IAQ Urban (3200) Excellent (2,000) Rural (2060) Good (10,000) 1-Hr. Ave. IAQ Urban (164) Excellent (20) Rural (147) Good (180)

16. 8-Hr. Ave. IAQ Urban (320) Excellent (50) Rural (320) Good (120)

17. 1-Hr. Ave. IAQ Urban (282) Excellent (40) Rural (119) Good (150)

18. 1-Hr. Ave. IAQ Urban (3200) Excellent (2,000) Rural (2060) Good (10,000)

19. 1-Hr. Ave. IAQ Urban (164) Excellent (20) Rural (147) Good (180)

20. Carcinogens & SBS/BRI Recommended changes : Formaldehyde : change to < 100ppb Radon : change to < 200 Bq./m 3 RSP : change to < TD 2.5 Particle Nos. Airborne Bacteria : To be deleted (Microorganism) (Mold counts) Parameter Unit Current Guidelines Recommendation Formaldehyde Ppb < 24 < 81 <100 Radon Bq./m 3 < 150 < 200 < 200 RSP(PM 10 ) µ g/m 3 < 20 < 180 TD 2.5 Particle Nos. Airborne Bacteria (Misnomer) cfu/m 3 < 500 < 1000 Delete