[Ibpsausa] Presentation on Glazing Performance

Jocelyn Gan jg at be-exchange.org
Thu Apr 21 10:59:10 PDT 2016

Dea IPBSA-USA Members,

I'd like to inform you of an upcoming event:

*Glazing + Comfort: Presentation on New Research
May 13, 2016  |  9 to 10:30 AM
*DISCOUNT - $10 for IBPSA Members*

Join BEEx for a presentation of new research on the widely misunderstood
impact of glazing selection on thermal comfort. Alejandra Menchaca, from
the highly regarded Boston firm Payette, will travel to NYC to present
their research findings on how the impact of glazing selection can
positively impact thermal comfort while reducing perimeter heating system
requirements in the winter time.

In our current paradigm, air temperature stands in as the primary metric of
thermal comfort, with set points driving selection and sizing of mechanical
systems. Any potential thermal comfort issues due to shortcomings in
envelope performance are typically compensated with perimeter heating,
further increasing the energy consumption of the building. This model is
due for reconsideration. A better understanding of how thermal comfort is
affected by different glazing performance criteria and geometries would
allow architects and engineers to make better informed decisions when
selecting a glazing scenario before it’s too late.

This talk will address two factors when designing glazed openings in cold
climates: radiant discomfort and downdraft discomfort, and how each
correlates to the glazing U-value, window geometry and the need for
perimeter heating. It will cover the physics of glazing heat loss and its
impact on comfort, as well as the decision-making process that needs to be
followed to ensure a comfortable environment early in the design. In
particular, Alejandra will address the impact that room-side low-e
coatings, which significantly reduce the U-value of a glazing unit, can
have on potential risk of downdraft.

Following the presentations Yetsuh Frank from BEEx will pose a few
questions, with time left for discussion with the audience as well.

Alejandra Menchaca, PhD, LEED AP
Senior Building Scientist | Associate

*Jocelyn Gan*
*Programs Associate*
o: 212.349.3900 * |*  m: 646.789.3223

Building Energy Exchange
31 Chambers Street, Suite 609
New York, NY 10007

Join #DaylightHour to TURN IT OFF on June 17
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