Engineered Systems - November 2008 - (Page 30) From dealing with soiled diffusers to offering a memorable rule of thumb about building pressure, this IAQ consultant and veteran expert witness testifies with this list of critical topics. Designers, operators, and owners can all pick up some tips here to boost occupant satisfaction and ensure that you’re not courting trouble with your ventilation. BY BUD OFFERMANN, P.E., CIH T 30 he following are my top 10 topics for reducing and fixing IAQ complaints. These 10 items were derived from my 30 years experience in over 2,000 IAQ investigations as well as the opinions collected during a meeting I had with other expert IAQ investigators (Mendel, M. J. et al. 2006). HEALTHY BUILDING CHECKLIST • Air temperature (70°F to 74°) • Air pressure (3 to 7 pascals positive with respect to outdoor air and special use areas) • Outdoor air ventilation (on prior to and continuous during occupancy, and at least the minimum flow rates as specified by ASHRAE 62.1, or preferably, 15 cfm/occupant and 1.0 ach, whichever is greater) • Outdoor air inlet (locate away from sources of air contaminants or odors) • Indoor sources (use low-emitting materials, isolate tenant improvement/construction areas, flush out areas) En gi neer ed S y stem s • Moisture (don’t let materials get and stay wet for more than two days) • Soiling around supply air diffusers (clean soiling around diffusers and improve air filtration) • Particle emissions from ventilation systems (fix sound liner erosion and clean ducts) • Air filtration (minimum of MERV 8 and preferably MERV 11 or 13, no ozone, electrostatics, or UV) • Occupant complaint/response system (implement one) AIR TEMPERATURE In air conditioned buildings, air temperatures should be kept between 70° and 74°. When air temperatures are too warm, occupants often complain that “there is no air,” and “the air is stuffy,” and generally perceive the quality of the indoor air as being poor. Apparently, a strong aversion to warm humid air is deeply wired in our brains. This air is often judged as “not being fresh” or “stale.” One of my mentors, the late Professor Ole Fanger from the Techni- 1 November 2008
Table of Contents Feed for the Digital Edition of Engineered Systems - November 2008 Engineered Systems - November 2008 Contents Editor’s Note HVAC Challenge Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Show Me The Motor Money The IAQ Top 10 Putting A Damper on Tragedy Special: Lighting Controls Computers & Software Products Glossary Classifieds Advertiser Index Tomorrow’s Environment Engineered Systems - November 2008 Engineered Systems - November 2008 - (Page Intro) Engineered Systems - November 2008 - Engineered Systems - November 2008 (Page Cover1) Engineered Systems - November 2008 - Engineered Systems - November 2008 (Page Cover2) Engineered Systems - November 2008 - Engineered Systems - November 2008 (Page 3) Engineered Systems - November 2008 - Contents (Page 4) Engineered Systems - November 2008 - Contents (Page 5) Engineered Systems - November 2008 - Editor’s Note (Page 6) Engineered Systems - November 2008 - Editor’s Note (Page 7) Engineered Systems - November 2008 - HVAC Challenge (Page 8) Engineered Systems - November 2008 - HVAC Challenge (Page 9) Engineered Systems - November 2008 - Back2Basics (Page 10) Engineered Systems - November 2008 - Back2Basics (Page 11) Engineered Systems - November 2008 - Case In Point (Page 12) Engineered Systems - November 2008 - Case In Point (Page 13) Engineered Systems - November 2008 - Case In Point (Page 14) Engineered Systems - November 2008 - Case In Point (Page 15) Engineered Systems - November 2008 - Case In Point (Page 16) Engineered Systems - November 2008 - Case In Point (Page 17) Engineered Systems - November 2008 - Case In Point (Page 18) Engineered Systems - November 2008 - Case In Point (Page 19) Engineered Systems - November 2008 - Commissioning (Page 20) Engineered Systems - November 2008 - Commissioning (Page 21) Engineered Systems - November 2008 - Building Automation (Page 22) Engineered Systems - November 2008 - Building Automation (Page 23) Engineered Systems - November 2008 - HVACR Designer Tips (Page 24) Engineered Systems - November 2008 - HVACR Designer Tips (Page 25) Engineered Systems - November 2008 - Show Me The Motor Money (Page 26) Engineered Systems - November 2008 - Show Me The Motor Money (Page 27) Engineered Systems - November 2008 - Show Me The Motor Money (Page 28) Engineered Systems - November 2008 - Show Me The Motor Money (Page 29) Engineered Systems - November 2008 - The IAQ Top 10 (Page 30) Engineered Systems - November 2008 - The IAQ Top 10 (Page 31) Engineered Systems - November 2008 - The IAQ Top 10 (Page 32) Engineered Systems - November 2008 - The IAQ Top 10 (Page 33) Engineered Systems - November 2008 - The IAQ Top 10 (Page 34) Engineered Systems - November 2008 - The IAQ Top 10 (Page 35) Engineered Systems - November 2008 - The IAQ Top 10 (Page 36) Engineered Systems - November 2008 - The IAQ Top 10 (Page 37) Engineered Systems - November 2008 - The IAQ Top 10 (Page 38) Engineered Systems - November 2008 - The IAQ Top 10 (Page 39) Engineered Systems - November 2008 - The IAQ Top 10 (Page 40) Engineered Systems - November 2008 - The IAQ Top 10 (Page 41) Engineered Systems - November 2008 - The IAQ Top 10 (Page 42) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 43) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 44) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 45) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 46) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 47) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 48) Engineered Systems - November 2008 - Putting A Damper on Tragedy (Page 49) Engineered Systems - November 2008 - Special: Lighting Controls (Page 50) Engineered Systems - November 2008 - Special: Lighting Controls (Page 51) Engineered Systems - November 2008 - Special: Lighting Controls (Page 52) Engineered Systems - November 2008 - Special: Lighting Controls (Page 53) Engineered Systems - November 2008 - Special: Lighting Controls (Page 54) Engineered Systems - November 2008 - Special: Lighting Controls (Page 55) Engineered Systems - November 2008 - Special: Lighting Controls (Page 56) Engineered Systems - November 2008 - Special: Lighting Controls (Page 57) Engineered Systems - November 2008 - Special: Lighting Controls (Page 58) Engineered Systems - November 2008 - Special: Lighting Controls (Page 59) Engineered Systems - November 2008 - Special: Lighting Controls (Page 60) Engineered Systems - November 2008 - Special: Lighting Controls (Page 61) Engineered Systems - November 2008 - Computers & Software (Page 62) Engineered Systems - November 2008 - Products (Page 63) Engineered Systems - November 2008 - Glossary (Page 64) Engineered Systems - November 2008 - Classifieds (Page 65) Engineered Systems - November 2008 - Classifieds (Page 66) Engineered Systems - November 2008 - Classifieds (Page 67) Engineered Systems - November 2008 - Classifieds (Page 68) Engineered Systems - November 2008 - Advertiser Index (Page 69) Engineered Systems - November 2008 - Tomorrow’s Environment (Page 70) Engineered Systems - November 2008 - Tomorrow’s Environment (Page Cover3) Engineered Systems - November 2008 - Tomorrow’s Environment (Page Cover4)
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