The purpose of this study was to investigate indoor environmental quality (IEQ) components of thermal, acoustic, and lighting conditions in a building compliant with sustainable guidelines through findings from a post-occupancy questionnaire and on-site readings. This study (1) identified thermal, acoustic, and lighting conditions that significantly affected occupant satisfaction with their office workspace and (2) determined if the required IEQ guideline standards correlate to occupants’ satisfaction. Questionnaire results did indicate occupants’ satisfaction with overall thermal conditions (OTC) and overall acoustic condition (OAC) was significantly different than their satisfaction with the overall physical environment. The thermal conditions multiple regression model indicated that temperature, air velocity, and humidity were contributing attributes of occupants’ OTC satisfaction. Furthermore, all acoustic attributes were found as significant contributors to OAC satisfaction in the acoustic conditions model, except for the ability to limit distraction for undesired sounds. The average physical readings of thermal, acoustic, and lighting conditions taken in selected workspaces did meet the guidelines required standards. Although some conditions of the environment were not as satisfying for occupants as others. Further analyses also indicated occupants’ satisfaction levels with the conditions varied significantly between workspace types (open and closed). Interior designers must understand that designing according to sustainable guidelines does not always create a satisfying physical environment for occupants.
United States Environmental Protection Agency (EPA), United States Consumer Product Safety Commission (CPSC). The inside story, a guide to indoor air quality: Office of radiation and indoor air, http://www.epa.gov/iaq/pubs/insidest.html (1995, accessed 1 July 2011).
AyrUCirilloEMartellottaF. An experimental study on noise indices in air conditioned offices. Appl Acoust2001; 62: 633–643.
7.
TangSKWongCT. Performance of noise indices in office environment dominated by noise from human speech. Appl Acoust1998; 55(4): 293–305.
8.
Veitch JA, Bradley JS, Legault LM, Norcross S and Svec JM. Masking speech in open-plan offices with simulated ventilation noise: Noise level and spectral composition effects on acoustic satisfaction (IRC-IR-846). Canada: National Research Council, http://www.nrc-cnrc.gc.ca/obj/irc/doc/pubs/ir/ir846/ir846.pdf (2002, accessed 8 August 2011).
9.
KangMGuerinDA. The characteristics of interior designers who practice environmentally sustainable interior design. Environ Behav2008; 41(2): 170–184.
10.
Abbaszadeh S, Zagreus L, Lehrer D and Huizenga C. Occupant satisfaction with indoor environmental quality in green buildings. In: Proceedings from healthy buildings, Lisbon 2006, vol III, 365–370, http://cbe.berkeley.edu (accessed 26 October 2009).
11.
GoncharJ. Looking back and moving forward. Archit Rec2008; 196(2): 160–169.
12.
LeeYGuerinD. Indoor environmental quality related to occupant satisfaction and performance in LEED-certified buildings. Indoor Built Environ2009; 18(4): 293–300.
13.
United States Green Building Council (USGBC). Welcome to USGBC, http://www.usgbc.org (accessed 5 July 2011).
14.
Minnesota Sustainable Building Guidelines, The State of (MSBG). Buildings, benchmarks & beyond (B3-MSBG) Version 2.1 guidelines, http://www.msbg.umn.edu/guidelines.html (accessed 10 July 2010).
MelikovAPitchurovGNaydenovKLangkildeG. Field study on occupant comfort and the office thermal environment in rooms with displacement ventilation. Indoor Air2005; 15(3): 205–214.
17.
NasrollahiNKnightIJonesP. Workplace satisfaction and thermal comfort in air conditioned office buildings: Findings from a summer survey and field experiments in Iran. Indoor Built Environ2008; 17(1): 69–79.
18.
SeppänenOFiskWJFaulknerD. Control of temperature for health and productivity in offices. ASHRAE Trans2005; 111(2): 680–686.
19.
Navai M and Veitch JA. Acoustic satisfaction in open-plan offices: Review and recommendations (IRC-RR-151). Ottawa, ON: National Research Council of Canada, Institute for Research in Construction, http://www.nrccnrc.gc.ca/obj/irc/doc/pubs/rr/rr151/rr151.pdf (2003, accessed 8 August 2010).
KjellbergALandströmUTesarzMSöderbergLÅkerlundE. The effects of nonphysical noise characteristics: Ongoing task and noise sensitivity on annoyance and distraction due to noise at work. J Environ Psychol1996; 16: 123–136.
WoodsonWETillmanPTillmanB. Human factors design handbook, 2nd ed. New York: McGraw-Hill, 1992.
27.
Illuminating Engineering Society of North America (IESNA). Handbook of the Illuminating Engineering Society of North America, 9th ed. New York: IESNA, 2010.
28.
MooreTCarterDJSlaterAI. A field study of occupant controlled lighting in offices. Lighting Res Technol2002; 34(3): 191–205.
29.
MooreTCarterDJSlaterAI. User attitudes toward occupant controlled office lighting. Lighting Res Technol2002; 34(3): 207–219.
30.
NewshamGRAriesMBCManciniSFayeG. Individual control of electric lighting in a daylit space. Lighting Res Technol2007; 40: 25–41.
31.
WrightMSHillSLCookGKBrightKT. The perception of lighting quality in a non-uniformly lit office environment. Facilities1992; 17: 476–484.
32.
YildirimKAkalin-BaskayaACelebiM. The effects of window proximity, partition height, and gender on perceptions of open-plan offices. J Environ Psychol2007; 27: 154–165.
33.
MooreTCarterDJSlaterAI. Long-term patterns of use of occupant controlled office lighting. Lighting Res Technol2003; 35(1): 43–59.
NewshamGRVeitchJACharlesKE. Risk factors for dissatisfaction with the indoor environment in open-plan offices: An analysis of cope field study data. Indoor Air2008; 18(4): 271–282.
41.
Lu Aue B, Charters M, Chiazor and Robinson J. Evaluation of occupant perception and satisfaction in two new office buildings. The University of Melborne, http://www.people.eng.unimelb.edu.au/lua/007.pdf (2005, accessed 7 July 2010).
