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BEAM P
LUS FOR
N
EW
B
UILDINGS
I
NDOOR
E
NVIRONMENTAL
Q
UALITY
(I
EQ
)
V
ERSION
1.2
I
EQ
14 T
HERMAL
C
OMFORT IN
N
ATURALLY
V
ENTILATED
P
REMISES
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 172
physiological factors considered was then derived from the data.
From the PMV, the Predicted Percentage of Dissatisfied people (PPD) can
be determined. As PMV moves away from neutral (PMV=0) in either
direction, PPD increases. The maximum number of people dissatisfied
with their comfort conditions is 100% and, as you can never please all of
the people all of the time, the minimum number even in what would be
considered perfectly comfortable conditions is 5%.
S
IMULATION
S
OFTWARE
For the purposes of simulating thermal conditions (and in estimating
energy use) previous BEAM assessments have employed the simulation
software HTB2 [6]. Any software meeting the requirements of ASHRAE
standard 140 [7] would be acceptable.
6
Alexander D K. HTB2 User Manual Version 2.0. Welsh School of Architecture, Cardiff University.
7
American National Standards Institute/American Society of Heating, Refrigeration and Air-conditioning Engineers.
ANSI/ASHRAE Standard 140-2001. Standard Method of Test for the Evaluation of Building Energy Analysis Computer
Programs