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James<br>
<br>
You can get the U value out of the derived parameters tab from the
Apache Constructions database menus. You will also get the G value,
which is kind of similar to the SHGC value you need I think just
looking at it quickly.<br>
<br>
One way to input glazing properties into an IES model when glazing
manufacturers give you an overall unit U value is to make one pane
fully transmittant and then put the overall properties into the other
pane. It's not exactly right, but it should give you the values
coherant with the factors you require. You may have to "massage" the
resistance value of the air and also the frame conductive transfer
coefficient values to give you values that correctly match a window
unit though.<br>
<br>
Regards<br>
<br>
Paul<br>
<br>
<br>
<br>
<br>
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<td valign="top"><font face="Calibri">Dr Paul Carey<br>
Director<br>
<br>
Zero Energy Design Ltd<br>
10A Portland Place, 2-22 Mottram Road, Stalybridge, SK15 3AD, UK.<br>
Tel: +44 161 3386200 Fax: +44 161 3031281 Mob: +44 789 4098012<br>
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href="mailto:Paul@zed-uk.com">Paul@zed-uk.com</a></font><br>
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James.Dudt@burthill.com wrote:
<blockquote
cite="mid:OF98FE098E.DCC3A33A-ON44257424.00244EEA-44257424.00249B0A@bhkra.com"
type="cite"><br>
<font face="sans-serif" size="2">Has anyone modeled a baseline
building
in Dubai for LEED, complying with ASHRAE 90.1? I'm wondering how
to match the glazing properties. ASHRAE lists a SHGC and a U-value,
but IES asks for transmittance, reflectances, and the refractive index.
</font>
<br>
<br>
<font face="sans-serif" size="2">What is the best way to model
glazing
to meet the ASHRAE requirements?</font>
<br>
<font face="sans-serif" size="2"><br>
James Dudt, EIT, LEED AP<br>
Mechanical Engineer<br>
Burt Hill<br>
Dubai, United Arab Emirates<br>
Tel: +971 4 810 5700<br>
Fax: +971 4 810 5800<br>
Mob: +971 50 154 4795<br>
http://www.burthill.com</font>
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