Indoor Environmental Air Quality: Case Studies

Good IEQ conditions are not only practical, but also achievable as the following two examples demonstrate.  The first example can be found on the campus of the University of British Columbia, the C.K. Choi building provides an inspiring example of creating a space with a healthy indoor environment . The designers, Matsuzaki Wright Architects, realized achieving a healthy indoor setting was critical to the enjoyment and productivity of the people who live and work there.  They implemented three main strategies to accomplish this goal.         

First, construction  was completed in a manner that allowed air pollutants to be flushed out during drywall installation, painting, and caulking.  The building was aired out before occupancy to prevent IAQ  problems stemming from the construction.  The second strategy provides occupants with appropriate ventilation.  Occupants are exposed to natural light and receive 20 cfm per person fresh air at all times.[i]  Since the building is continually flushed with outdoor air, there is always a high level of indoor air quality.  To prevent cross-contamination  of the air, copy rooms are directly vented. 

In addition to high ventilation rates, the third strategy was a conscientious selection of low off-gassing materials.  Finishes  free of solvents and low volatile organic compound products were used.  No adhesives  were used to lay the carpet; rather it was attached by a tack strip method.  Formaldehyde -free Medite  was chosen for all the millwork.

Addressing and designing for indoor air quality  in construction , ventilation and material selection created a healthy indoor environment .  The C.K. Choi Building won the 1996 Building Owners and Managers Association’s Earth Award.  It serves as a template for designing and constructing a building based on goals and more importantly, values.                   

The second example is the Audubon House, in Manhattan, New York, which serves as headquarters for the National Audubon Society.  When renovating and furnishing this structure, low off-gassing materials – textiles, tile, wood,  and countertops – were used.  The carpeting is 100 percent natural, undyed wool; it is tacked down rather than glued.  Choosing materials that do not pollute the air and providing proper ventilation created good IAQ conditions.  Each occupant receives 26 cubic feet per minute of outdoor air, which is higher than the ASHRAE  recommended amount.[ii]  Additionally, attention was paid to the placement of the air intake; it is located on the roof away from exhaust vents and street fumes.  These measures produce a healthy work environment .