Indoor Environmental Quality: Affects on
Productivity, Learning and Energy Efficiency
We'll be expanding our content on this very important topic as
it becomes clearer to the architectural and engineering
community that all design is human factor
design as such
IEQ will always trumps energy and aesthetics concerns. It can be
when IEQ becomes the focus of design energy
efficiency will naturally follow. We'll be discussing this
ASHRAE IAQ 2013 Environmental Health in Low Energy Buildings,
October 15 - 18, 2013, Vancouver, British Columbia, Canada.
While we develop the pages on this topic, we have received permission from
CIBSE to republish
an overview of IEQ research on productivity from their Technical
Memoranda TM24: 1999. Although the document is well over a
decade old the messages are still very applicable.
addressing thermal comfort and other IEQ issues, buildings and
other enclosed spaces are increasingly challenged to provide a
healthy environment in an energy efficient manner. The complex
relationship between indoor and outdoor environmental
conditions, coupled with the impacts of climate change, requires
a paradigm shift towards creating buildings that are comfortable
and healthy for the occupants yet also energy efficient.
Although the goal of improved IAQ and thermal comfort can be
achieved by increasing energy consumption, it can also be
achieved without significant increase or even with decreased
ASHRAE IAQ 2013
As noted recently by Dan In-Hout,
"Comfort should always trump energy use. In truth, we are, first
of all, in the business of applied biophysics. Doing so using
the least amount of energy is not the goal, but part of the
Notebook: Comfort vs. Energy Use. ASHRAE Journal, vol. 55,
no. 7, July 2013
Environmental Factors Affecting Office Worker Performance:
Review of Evidence
Environmental factors affecting office worker performance
provides evidence of how
the physical environment affects productivity in the workplace.
The guide includes performance measures, staff costs,
psychological process and motivation, and the effect of physical
"Cold employees weren’t just uncomfortable, they
were distracted. The drop in performance was costing employers
10% more per hour, per employee."
Want More Productive Workers? Adjust Your Thermostat,
Psychology Today, July, 2013
Kim, J., de Dear, R.
How does occupant perception on specific IEQ factors affect
overall satisfaction? Network for Comfort and Energy Use
in Buildings. Proceedings of 7th Windsor Conference: The
changing context of comfort in an unpredictable world.
Cumberland Lodge, Windsor, UK, 12-15 April 2012. London
Fisk, W.J., Rosenfeld, A.H.
Estimates of improved
productivity and health from better indoor environments.
Indoor Air. 1997;7:158–172
TM40 Health Issues in Building Services (FREE download)
ANSI/ASHRAE Standard 55 Thermal Environmental Conditions for
Education and the Built Environment
ASHRAE Guideline 10, Interactions Affecting the Achievement
of Acceptable Indoor Environments
ANSI/ASHRAE Standard 62.1, Ventilation for Acceptable Indoor
ANSI/ASHRAE Standard 62.2, Ventilation and Acceptable Indoor
Air Quality in Low-Rise Residential Buildings
ISO 7730:2005, Ergonomics of the Thermal Environment-
Analytical Determination and Interpretation of Thermal
Comfort using Calculation of the PMV and PPD Indices and
Local Thermal Comfort Criteria.
ISO Standard 7933: Ergonomics of the thermal environment -
Analytical determination and interpretation of heat stress
using calculation of the predicted heat strain.
ISO Standard 7726: Ergonomics of the thermal environment -
Instruments for measuring physical quantities.
Center for the Built Environment, Occupant IEQ
Survey Development and Implementation Costs, 2009
Fanger, P.O. 1982. Thermal Comfort. Malabar,
FL: Robert E. Krieger Publishing Co.
Human comfort and self-estimated performance in relation
to indoor environmental parameters and building features,
Temperature Wars: Savings vs. Comfort, International
Facility Management Association (IFMA), 2009
Wyon, D.P., Wargocki, P.,
Effects of indoor environment on performance, ASHRAE
Journal March 2013
Friedman, R., 2013. Want More Productive
Workers? Adjust Your Thermostat, Psychology Today, accessed
July 19th, 2013 <http://www.psychologytoday.com/collections/201307/employee-the-month/need-edge-adjust-your-thermostat>
Do I need an
engineer? A Guide to HVAC/Indoor Climate Design Service
HVAC does not equal IEQ
will your indoor climate system score?
How to "ball park" your budget for
indoor climate control.
Indoor environments: Self assessment
Built to code: What does it mean for consumer thermal comfort?
The Total Comfort System -
The "Un-minimum" System
Comfort: A 40 grit perspective for consumers
Comfort: A Condition of Mind
Do-It-Yourself HVAC - Should you do it?
The Cost of HVAC Systems - Are You Paying Too Much for Downgrades?
Radiant Installations - The Good, Bad
Thermal Comfort Surveys - Post Occupancy, Part I
Thermal Comfort Surveys - Post Occupancy, Part II
support on this topic visit our