[Bldg-sim] LEED EA P2 requirement clarification

[Leonard Sciarra]

Seems to me, that these components if they are touched do need to be upgraded (note there are some exceptions to this (see 5.1.3)) barring those,

Two thoughts come to mind:
4.1.1.5 Changes in Space Conditioning. Whenever
unconditioned or semiheated spaces in a building are converted
to conditioned spaces, such conditioned spaces shall
be brought into compliance with all the applicable requirements
of this standard that would apply to the building envelope,
heating, ventilating, air-conditioning, service water
heating, power, lighting, and other systems and equipment of
the space as if the building were new.
So that's pretty clear, but limited in scope to particular projects,

more generally:
4.1.1.4 Replacement of Portions of Existing Buildings.
Portions of a building envelope, heating, ventilating, airconditioning,
service water heating, power, lighting, and other
systems and equipment that are being replaced shall be considered
as alterations of existing

following this to the definition and then to the scope of alterations leads one to section 4.2.1.3
4.2.1.3 Alterations of Existing Buildings. Alterations
of existing buildings shall comply with the provisions of Sections
5, 6, 7, 8, 9, and 10, provided, however, that nothing in
this standard shall require compliance with any provision of
this standard if such compliance will result in the increase of
energy consumption of the building.
Exceptions:
a. A building that has been specifically designated as
historically significant by the adopting authority or is
listed in The National Register of Historic Places or
has been determined to be eligible for listing by the
US Secretary of the Interior need not comply with
these requirements.
b. Where one or more components of an existing building
or portions thereof are being replaced, the annual
energy consumption of the comprehensive design
shall not be greater than the annual energy consumption
of a substantially identical design, using the same
energy types, in which the applicable requirements of
Sections 5, 6, 7, 8, 9, and 10, as provided in Section
4.2.1.3, and such compliance is verified by a design
professional, by the use of any calculation methods
acceptable to the authority having jurisdiction.

Thanks

Leonard Sciarra
Senior Associate
+1 (312) 577.6580 Direct
+1 (847) 345.5619 Cell

Gensler
11 East Madison Street
Suite 300
Chicago IL 60602

From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Snarski, Marty
Sent: Monday, February 08, 2010 2:05 PM
To: Bishop, Bill; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] LEED EA P2 requirement clarification

Thanks, Bill.

That's pretty much been my interpretation, as well.  However, it was suggested by some in the office that LEED specifically called for THAT section (5.4) to be met to ensure that the whole envelope was brought up to Section 5.4 requirements......and that got me second-guessing my interpretation.

At any rate, I appreciate the input.

Martin Snarski  LEED(r) AP
SHWGROUP

From: Bishop, Bill [mailto:wbishop at pathfinder-ea.com]
Sent: Monday, February 08, 2010 3:01 PM
To: Snarski, Marty; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] LEED EA P2 requirement clarification

Martin,

I'll argue that you should not need to upgrade the envelope of an existing building to meet Section 5.4 except where you are creating new envelope surfaces (such as new building additions). Likewise, you should not need to improve the efficiency of existing equipment per Section 6.4, as long as you are not replacing it with new. The scope of Standard 90.1-2007 (and -2004) includes:
1.)   new buildings and their systems
2.)   new portions of buildings and their systems
3.)   new systems and equipment in existing buildings

My standard disclaimer that I am not a LEED reviewer applies.

Regards,
Bill

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.
________________________________
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Snarski, Marty
Sent: Monday, February 08, 2010 2:43 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] LEED EA P2 requirement clarification

There is a debate going on in my office currently, regarding existing buildings and their envelopes and what is required for EA Prerequisite 2.

The LEED 2009-NC Guide says:

 "To achieve points using this credit, the proposed design must meet the following criteria:

-Comply with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4 and 10.4) in Standard 90.1-2007 (with errata but without addenda).
-Inclusion of all the energy costs within and associated with the building project.
-Compare against a baseline building that complies with Appendix G......  (we all know about that part).

What's got the debate going is that part about Complying with the mandatory provisions (particularly Section 5.4).  Now, we do a lot of existing buildings, wherein no insulation is added.  I know that, when creating the energy model, that when modeling existing buildings, or portions of existing buildings, where no alterations are being made, that both the Proposed and Baseline building are modeled with the as-existing construction.  However, it was brought up that, as the LEED Guide specifically calls out Section 5.4 (which I've been unable to find any mention of existing buildings), was intentional, to for any would-be LEED projects to bring their existing envelope constructions up to Section 5.4 requirements.  I've looked over the CIRs and didn't find anything really telling.

Does anyone have any insights or suggestions?

Thanks!

Martin Snarski   LEED(r) AP
Mechanical Engineer


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