INTRODUCTION TO LEED™HVAC
BUILDING COMMISSIONING
Harris Sanoo,Commissioning Manager (ASHRAE Certified)
Energy Management Services Int.
Topics
• Building Commissioning Overview and Advantages
• Commissioning Process and Objectives
• LEED Commissioning Requirements
• Project Team involvement
• Design, Construction and Post occupancy phase
activities
What is Building Commissioning?
• Commissioning is a process of verifying and
documenting that the building Energy Systems are
designed, installed and operated efficiently according
to owner’s requirements and basis of design.
• It begins in pre-design and continues through
design, construction, and occupancy of the facility.
• Commissioning is often misinterpreted as ‘Testing
and Balancing’ (TAB), which is an activity at the end
of construction by a contractor.
Commissioning Benefits
• Delighted occupants &
stakeholders
• Systems perform as intended
• Lower energy use and cost
• Early detection of potential
problems
• Better building documentation
• Trained building operators
• Lower operation and
maintenance cost
• Reduced Contractor callbacks
• Improves maintainability of
equipment/systems
Occupant Needs
Occupancy
& Operation
Pre-Design
Design
Construction
The Commissioning Process
The Commissioning Process
• The Commissioning (Cx) Process
involves steps that are integrated into
every phase of the project:
•
• Commissioning is NOT just testing at
the end!
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Pre-Design Phase Objectives
• Document/Review Owner’s Project
Requirements
• Scope & budget for commissioning
• Select Commissioning Authority
• Create Commissioning Plan
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Design Phase Objectives
• Document/Review Basis of Design
• Refine scope of commissioning
• Perform Cx Focused Design Reviews
• Update Commissioning Plan
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Design Phase- Design Review
Some key elements…..
• Cooling load calculation and plant sizing or Peak cooling
load.
• Equipment Sizing
• Building Envelope
• Ventilation strategies and quantities
• Energy saving measures and Building simulation
• System operational sequences
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Design Phase Objectives
• Include commissioning requirements in
construction documents
– Develop commissioning specifications
– Develop construction checklists and functional
performance test procedures
– Define format and content of systems manual
– Define training requirements
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Construction Phase Objectives
• Update Owner’s Project Requirements
• Update Commissioning Plan & schedule
• Review Submittals against Cx Plan, OPR, and BOD
• Review control sequences
• Update construction checklists
• Update functional performance test procedures
• Document construction observations
• Develop Systems/O&M Manuals
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Construction Phase Objectives
• Train O&M Personnel
• Complete Construction Checklists
• Perform Functional Performance Testing (FPT)
• Document deficiencies found during FPT’s (Issues
Log)
• Correct deficiencies and retest
• Prepare Final Report
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Cx: Occupancy and Operations
Phase Objectives
• Provide ongoing guidance to assist
Operations and Maintenance to achieve
OPR
• Complete Seasonal Testing
• Document lessons learned
• Complete warranty follow-up
PRE-DESIGN DESIGN CONSTRUCTION OCCUPANCY & OPERATION
Commissioning for LEED
New Construction Projects
The LEED
Family of
Rating
Systems
LEED for Building Design and Construction
LEED for Commercial Interiors
LEED for Core and Shell
LEED for Building Operation and Maintenance
LEED for Homes
LEED for Neighborhood Developments
LEED for Schools, Retail, Healthcare
The LEED Credit
Categories
Sustainable Sites (SS) 26
Water Efficiency (WE) 10
Energy & Atmosphere (EA) 35
Materials & Resources (MR) 14
Indoor Environ. Quality (EQ) 15
Innovation & Design (ID) 6
There are 8 prerequisites
Cx
EA Prerequisite 1
EA Credit 3
Understanding Commissioning
Requirements
LEED for Building Design and Construction
EA: Prerequisite 1EA: Prerequisite 1
Fundamental Fundamental
Building Energy
Systems
Commissioning
Enhanced Enhanced
Commissioning
EA: Credit 3EA: Credit 3
EA Prerequisite 1 EA Credit 3
Understanding Commissioning
Requirements
LEED for New Construction
EA Prerequisite 1Fundamental Building Energy Systems
Commissioning
EA Prerequisite 1 EA Credit 3
Intent
• Fundamental Commissioning of the Building Energy
Systems
– Verify that the building’s energy related systems…are
installed, calibrated and perform…according to the owner’s
project requirements, basis of design, and construction
documents
EA Prerequisite 1 EA Credit 3
LEED Certification RequirementsEnergy and Atmosphere Prerequisite 1
Fundamental Commissioning of the Building Energy Systems
Requirements:
1. Designate Commissioning Authority (CxA)a. CxA experienced in at least two building projects
b. CxA independent of project design and CM—may be part of same company.
c. CxA reports directly to owner.
d. Small projects: acceptable to have CxA as part of design or construction team
2. CxA reviews Owner’s Project Requirements and Basis of Design.
3. CxA incorporates Commissioning (Cx) requirements into Construction Documents
4. CxA develop and implement Cx Plan
5. CxA verify the installation and performance of the systems to be Cmx.
6. CxA to complete a summary Cmx report
LEED template letter is provided stating items have been completed.
Energy System means….
• Commissioned Systems
– Commissioning process activities shall be completed for the
following energy-related systems, at a minimum:
• Heating, ventilating, air conditioning, and refrigeration
(HVAC&R) systems (mechanical and passive) and associated
controls
• Lighting and daylighting controls
• Domestic hot water systems
• Renewable energy systems (wind, solar, etc.)
EA Prerequisite 1 EA Credit 3
Cx Authority Qualifications
• In order to meet this prerequisite, owners are required to use
qualified individuals to lead the commissioning process.
Qualified individuals are identified as those who possess a high
level of experience in the following areas:
– Energy systems design, installation and operation
– Commissioning planning & process management
– Hands-on field experience with energy systems performance,
interaction, start-up, balancing, testing, troubleshooting, operation,
and maintenance procedures
– Good knowledge of Building Energy Simulation procedures
– Energy systems automation control knowledge
EA Prerequisite 1 EA Credit 3
Miscellaneous
• This LEED Reference Guide provides guidance on the rigor expected
for this prerequisite for the following:
– Owner’s Project Requirements
– Basis of Design
– Commissioning Plan
– Commissioning Specification
– Performance Verification Documentation
– Commissioning Report
• Owner’s are encouraged to consider including water-using systems,
building envelope systems, and other systems in the scope of the
commissioning plan as appropriate.
EA Prerequisite 1 EA Credit 3
Understanding Commissioning
Requirements
LEED for BD+C
EA Credit 3Enhanced Commissioning
EA Prerequisite 1 EA Credit 3
Intent
• Enhanced Commissioning
– Begin the commissioning process early during the
design process…and execute additional activities
after systems performance verification is
completed.
EA Prerequisite 1 EA Credit 3
Energy & Atmosphere Credit 3Enhanced Commissioning
Requirements:1. Prior to start of Construction Document phase, designate
independent CxA.
a. CxA experienced in at least 2 building projects.
b. CxA shall be:
i. Independent of design and construction
ii. Not an employee of design firm—may be contracted through them
iii. Not an employee of CM
iv. Can be a qualified employee or consultant of the Owner
c. CxA report directly to the Owner
d. Requirement has no deviation for project size.
Energy & Atmosphere Credit 3Enhanced Commissioning
Requirements, continued:2. CxA conducts (minimum) one Cmx design review of OPR and BOD
and CD documents. Back-check the review comments.
3. CxA review selected contractor submittals for compliance with the OPR & BOD—concurrent with A/E reviews.
4. CxA assists in the development of the system manual for operating staff.
5. CxA verify requirements for training operating personnel and building occupants.
6. CxA shall be involved with reviewing building operation within 10 months after substantial completion/with staff and occupants. Include a plan for resolution of Cmx issues.
Responsible Tasks
Task Responsibility
Final version of the BOD A/E
System single line diagrams A/E
As-built sequences of operations, control drawings and original setpoints Contractor
Operating instructions for integrated building systems Contractor
Recommended schedule of maintenance requirements and frequency, if not
already included in the project O&M manuals
Contractor
Recommended schedule for retesting of commissioned systems with blank
test forms from the original Commissioning Plan
CxA
Recommended schedule for calibrating sensors and actuators Contractor
EA Prerequisite 1 EA Credit 3
Occupancy Review
• Assure the involvement by the CxA in reviewing
building operation within 10 months after substantial
completion with O&M staff and occupants. Include a
plan for resolution of outstanding commissioning-
related issues.
• The CxA should coordinate with the Owner and the
O&M staff to review the facility and its performance 8
to 10 months after handover of the facility.
EA Prerequisite 1 EA Credit 3
Task 6: Occupancy Review (continued)
• Any outstanding construction deficiencies or deficiencies
identified in this post-occupancy review should be
documented and corrected under manufacturer or
contractor warranties.
• The CxA review of the building operation with operations
staff and occupants should identify any problems in
operating the building as originally intended. Any
significant issues identified by the CxA that will not be
corrected should be recorded in the systems manual.
EA Prerequisite 1 EA Credit 3
Primary Responsibility LEED for
New Construction Reference GuideEAp1 Task
#
EAc3 Task
# Task Description
If you are only meeting
EA Prerequisite 1
If you are meeting EAp1
& EAc3
1 1 Designate Commissioning Authority (CxA) Owner or Project Team Owner or Project Team
2 Document Owner’s Project Requirements (OPR) Owner Owner
2 Develop Basis of Design Design Team Design Team
3Incorporate commissioning requirements into the construction
documentsProject Team or CxA Project Team or CxA
2Conduct commissioning design review prior to mid-construction
documentsCxA
4 Develop and implement a commissioning plan Project Team or CxA Project Team or CxA
3Review contractor submittals applicable to systems being
commissionedCxA
5Verify the installation and performance of commissioned
systemsCxA CxA
4 Develop a systems manual for the commissioned systems Project Team or CxA
5 Verify that the requirements for training are completed Project Team or CxA
6 Complete a summary commissioning report CxA CxA
6Review building operation within 10 months after substantial
completionCxA
Project Team = Owner, Architect
Engineer and/or Builder
ASHRAE Guidelines for Cx
• ASHRAE Guideline 0-2005 – The Commissioning
Process
• ASHRAE Guideline 1.1-2007 – HVAC&R Technical
Requirements for the Commissioning Process
• • ASHRAE Learning Institute course: Commissioning
Process in New and Existing Buildings
• ASHRAE Learning Institute course: Commissioning
Process and ASHRAE’s Guideline 0
Energy Management Services,
Suite 303, Liberty Building,
Dubai, U A E.
Phone: +971 4 2827000
E-mail: [email protected]
Web: www.ems-int.com