[Equest-users] Reflectivity vs Absorbtance

[Bishop, Bill]

Yes, you are correct to use an absorptance of 0.70 for roofs when
modeling in eQUEST. However, where does App. G specify the same
reflectivity requirement for walls?
 
William Bishop, EIT, LEED(r) AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer
 
134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
F: (585) 325-6005
wbishop at pathfinder-ea.com
www.pathfinder-ea.com
P Please strive to live sustainably.         
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From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
mabiz at cox.net
Sent: Sunday, February 07, 2010 5:36 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Reflectivity vs Absorbtance
 
ASHRAE Appendix G requires baseline models to have roofs and walls with
a Reflectivity of 0.30 but eQuest only allows for entering the
Absorbtance value.  Am I correct to assume that with obpaque surfaces
Absorbtance = (1 - reflectivity)?
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