Page 172 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

150 Cha pte r F o u r

Mandatory measures • Building Envelope Compliance Documentation
(all projects) (Part I)—Mandatory Provisions Checklist
• HVAC Compliance Documentation (Part II)—Mandatory
Provisions Checklist
• Service Water Heating Compliance Documentation
(Part I)—Mandatory Provisions Checklist
• Lighting Compliance Documentation (Part I)—Mandatory
Provisions Checklist
Prescriptive requirements • Building Envelope Compliance Documentation (Part II)
(projects using prescriptive • HVAC Compliance Documentation—Part I for
compliance approach) buildings <25,000 ft using the simplified approach
2
or Part III for all other buildings
• Service Water Heating Compliance Documentation
Performance requirements • Performance Rating Report
(projects using performance • Table documenting energy-related features included
compliance approach and in the design, and including all energy features that
when EA Credit 1 Option 1 differ between the baseline design and proposed
is being sought) design models

Source: Courtesy LEED-NC 2.2 Reference Guide.
TABLE 4.0.5 EAp2 Compliance Forms Based on ASHRAE Standard 90.1-2007 and Updated for
LEED 2009

• There are exceptions to Section 6 (HVAC) for projects served by existing HVAC
systems such as central energy plants. For example, existing systems that service
the project, but are outside of it, do not have to conform to all the requirements
of this prerequisite.
• Section 9 covers lighting and includes both indoor and exterior lighting. The
reduction in exterior lighting from this prerequisite is also a part of SSc8.
• Credit for natural ventilation may be obtained in the energy modeling on a
case-by-case basis with additional documentation.

Table 4.0.5 is based on the LEED-NC 2009 Reference Guide and gives a good
summary of some of the documentation for the various paths chosen for this prerequisite.
Note that most LEED-NC projects do seek the EA credit 1, and therefore, only the first
and third items in this table are applicable.

EA Prerequisite 3: Fundamental Refrigerant Management
The intent of this prerequisite is to help maintain the ozone levels in the stratosphere.
The chemical and physical makeup of the stratosphere is different from the atmosphere
in the troposphere where we live and breathe. The stratosphere is located above the
troposphere and is where many jets fly. Over the past century, many chemicals were
developed as effective means for refrigeration and fire suppression. When these chemicals
leaked or were expelled into the troposphere, the effects seemed to be fairly benign, and
therefore, they became very commonly used. However, scientists have recently shown