RE: RE: Re: [EnergyPlus_Support] ASHRAE 90.1 Baseline Building

Appendix G is not a compliance path for ASHRAE 90.1 (See chapter 4 and G1.1). It is intended as a method to rate energy efficient buildings going beyond the requirements of 90.1.

Using the rules in appendix G, you can show how efficient your building is compared to a baseline building (also following rules in app. G) that complies with 90.1 by modeling both buildings. So, your proposed building should follow the assemblies and insulation levels indicated on the building drawings.

The tables in Chapter 5 are for buildings following one of the paths for compliance with 90.1. Again, see chapter 4 for compliance paths.

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:

Thanks, Jean.

Sorry, but my original post was sent in hurry.

Here I want to reassure that:

Baseline building envelope uses ONLY:

Roof - Insulation Entirely above Deck (1 of 3);
Above-Grade Wall - Steel-Framed (1 of 4);
Floor - Steel-Joisted (1 of 3)
Opaque door types shall match the proposed design and conform to the U-factor requirements from the same tables.
Slab-on-grade floors shall match the F-factor for unheated slabs from the same tables.
Opaque assemblies used for alterations shall conform with Section 5.1.3.

Proposed building can use ANY:

3 roof types;
4 wall types;
1 below-grade wall;
3 floor types;
2 slab-on-grade floor types
2 opaque door types

shown in Tables 5.5-1 through 5.5-8, with typical detailed constructions listed in appendix A (or recommend proposed building using these constructions even though the use of constructions for proposed design can be arbitrary, as the Standard states "All components of the building envelope in the proposed design shall be modeled as shown on architectural drawings or as built for existing building envelopes.").

Please confirm above understanding is right. If not, please correct with comments. Thank you very much indeed.

Sean

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:

Yip. Also note the reflectivity for the roof must be 0.3 (unless you have an SRI better than somthing very high...I don't remember).

Mit freundlichen GrÃ¼Ã?en- Sent from my iPhone (excuse the brevity)

i. A.

Jean Marais

b.i.g. bechtold

Tel. +49 30 6706662-23

On 08.10.2013, at 18:02, <seanking.1970@...> wrote:

Dear all,

In Standard 90.1-2007 SI edition, Page 178, Table G3.1 No.5 Building Envelope section:

Can I understand for baseline building we only need to use roof - insulation entirely above deck, above-grade wall - steel-framed, floor - steel-joisted etc. Other constructions in Appendix A just for the purpose of using for proposed building?

Thanks and regards,

Sean