[Equest-users] Simplified Method Glass Conductance Entry

[Mehta, Gaurav]

Use the formula below to convert Glazing U-value to Conductance.

Conductance = 1/((1/Glazing U)-0.2)

This formula  is from the DOE-2 Reference manual.

Best regards,

Gaurav

Gaurav Mehta, LEED® AP BD+C
Sustainable Building Analyst
Stantec
1932 First Avenue Suite 307
Seattle WA 98101
Ph: (206) 770-7779
Fx: (206) 770-5941
Gaurav.Mehta at stantec.com
stantec.com<http://www.stantec.com>

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Riley Beise
Sent: Thursday, March 24, 2011 2:12 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Simplified Method Glass Conductance Entry

Hi all,

I'd like to be able to enter my total glazing U values in one place for simplicity.  I set my frame widths to zero and defined my window glass type in "simplified" where I entered my total window U value in the "Glass Conductance" field.  When I check my LV-D report it shows my windows having a lower U value than what I entered.  I understand there are some variables at play here that are likely the cause (air film resistance and windspeed of rating (summer vs winter as shown in the topic help).  I don't understand what is going on here.

So,

Can someone shed some light on why my LV-D window U values don't match my "Glass Conductance" value in these circumstances?

And, how would you recommend I enter my windows if I have the overall U value already from product data?

Thanks

Riley

___________________________________
Riley Beise, EIT, LEED GA
Green Building Specialist

Enermodal Engineering Ltd.
602-2303 4th St. SW, Calgary AB T2S 2S7
p. 403-244-0474 ext. 435
f. 403-244-0475
e. rbeise at enermodal.com<mailto:bpapau at enermodal.com>
www.enermodal.com<blocked::http://www.enermodal.com/>

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