[BLDG-SIM] ASHRAE 90.1-2004 Appendix G for Existing Buildings

[Gaurav Mehta]

Jeffrey,

I think your assumption is valid. As you have rightly mentioned that the Baseline Building envelope would reflect the existing envelope conditions (Table G3.1, Section 5, item (f)). 

Lighting, usage, schedules, occupancy for the Baseline Building are governed by Table G3.1, Sections 2, 3 and 4 which are 'Same as Proposed Design'. 

Keeping the function as a warehouse (occupancy, lighting, schedules, etc) in the baseline and comparing it with the proposed design as an office would not be a valid approach. 

Hope this answers your question.


Best regards,

Gaurav Mehta
Sustainable Building Analyst,
Stantec Consulting


  ----- Original Message ----- 
  From: Ross-Bain, Jeff 
  To: BLDG-SIM at gard.com 
  Sent: Monday, June 18, 2007 08:39
  Subject: [BLDG-SIM] ASHRAE 90.1-2004 Appendix G for Existing Buildings


  Hello All,

   

  Can someone please help with this interpretation?

   

  Table G3.1, Section 5, Building Envelope, Item (f) under Baseline Building indicates that baseline envelope conditions shall reflect the existing conditions prior to revision. The project I am modeling is an existing building that had single pane glass and CMU walls with no insulation. The internal use of the existing building was quite different from the new (we are going from a warehouse to an office). I assume, then, that the Baseline Building will reflect the existing envelope conditions but with the new conditions (i.e. lighting, space usage, schedules, occupancy, etc.) and the Proposed Building will reflect the improved building envelope (with, of course, the other energy efficiency measures designed into the renovated building).

   

  Is this a valid assumption?

   

  Many thanks,

  Jeffrey G. Ross-Bain, PE, LEED 
  Smith Dalia Architects 
  621 North Ave NE 
  Suite C-140 
  Atlanta, GA, 30308 
  404-892-2443 
  www.smithdalia.com 

  P Consider the environment. Please don't print this e-mail unless you really need to.

   


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