Finding Value in Building Enclosure Commissioning

Transcription

1 Finding Value in Building Enclosure Commissioning Brian S. Rose, P.E. Technical Staff Jeffrey D. Kerr, P.E. Senior Project Manager 12 March

2 Course Description This presentation will outline the Building Enclosure Commissioning (BECx) process. In general, BECx is a quality-focused process for enhancing the delivery of a project. The process focuses upon verifying and documenting that the building systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the Owner s Project Requirements (ASHRAE Guideline ). Using the established guidelines and project examples, we will describe the BECx process, outline on the roles and responsibilities of the BECx Agent, discuss the value inherent with the BECx process, and examine the future of BECx. 2

3 Learning Objectives 1. Understand the overall Building Enclosure Commissioning (BECx) process and current standards. 2. Learn the scope of quality assurance provisions embodied in the standards. 3. Understand the value of BECx process during early design phases through construction and occupancy, and how it is different from building enclosure consulting. 4. Learn how to select the scope of BECx work to reduce risk of future enclosure issues and enhance building performance. 3

4 Acronyms AOR DOR Cx CxA BECx BECxA ECA OPM Architect of Record Designer of Record Commissioning Commissioning Authority Building Enclosure Commissioning Building Enclosure Commissioning Agent Enclosure Commissioning Agent Owner s Project Manager OPR BOD Owner s Project Requirements Basis-of-Design 4

5 Presentation Outline Define BECx and Discuss Commissioning-Related Standards Review the Enclosure Commissioning Process Roles and Responsibilities Examples Selecting the appropriate BECx scope Identify the Value-Added Aspects of BECx 5

6 What is Commissioning? A quality-focusedprocess for enhancing the delivery of a project. The process focuses upon verifying and documenting that the facility and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the Owner s Project Requirements. American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE), Guideline

7 Why Do We Commission Enclosures? Organized check of all Owner goals and all relevant systems Defined path for decisions Increased quality assurance 7

8 Why Do We Commission Enclosures? Building Requirements Meeting Code Life Safety Aesthetics Cost Constructability Durability Occupancy Sustainability Thermal Performance Energy Consumption Occupant Comfort Operation Costs Acoustics Enclosure Systems Air barrier Vapor Retarder Insulation Cladding Below-grade Waterproofing Exposed Roofing Green Roofing Curtain Wall Storefront Windows Doors Skylights 8

9 Why Do We Commission Enclosures? Required by Federal/State/Local Agencies Owner s Requirements LEED Credits Quality Assurance and Risk Management 9

10 Commissioning Guidelines ASHRAE/NIBS Guideline 0 (2005) The Commissioning Process ASHRAE Guideline 1 (1989) The HVAC Commissioning Process NIBS Guideline 3 (2006) Building Enclosure Commissioning Process BECx 10

11 Commissioning Guidelines ASHRAE Guideline 0 ASHRAE Guideline 1 NIBS Guideline 3 USGBC LEED v4-2012: Reference Guide for Green Building Design and Construction ASTM E : Standard Practice for Building Enclosure Commissioning 11

12 Building Enclosure Commissioning Process Pre-Design Design Retro-Commissioning Pre- Construction Construction Occupancy and Operations 12

13 Owner s Project Requirements (OPR) Pre-Design Programmatic + Aesthetic + Functional Energy (ASHRAE 90.1) Environment (exterior climate, interior conditions) Safety (blast resistant, seismic zone, fire protection) Security Durability (anticipated service life) Sustainability (LEED) Operation (accessibility for maintenance) 13

14 Owner s Project Requirements (OPR) Pre-Design Owner s definition of building quality. Owner s assessment of risk. Building size, type, and complexity. Quality OPR Time Cost 14

15 Owner s Project Requirements (OPR) Pre-Design 15

16 Commissioning Plan Pre-Design Overview of Commissioning Process Defines Roles and Responsibilities Documentation of Communication Channels Description of Commissioning Activities Procedures of Documenting Commissioning Activities 16

17 BECx Plan: Roles and Responsibilities Pre-Design BECxA Enclosure Consultant Designer Other Designers Owner Subcontractors Contractor Enclosure Consultant 17

18 BECx Plan: Roles and Responsibilities Pre-Design 18

19 Basis-of-Design (BOD) Design OPR BOD Energy Consumption Goals Tolerance for Water Leaks Thicker and Tapered Insulation (R-25) Heat-Welded PVC Membrane Soldered Flashing 19

20 BECx Design Reviews Design General Quality Review Coordination Review Building Enclosure System-Specific Review Building Enclosure Specification Review 20

21 Design Reviews Design 21

22 Design Reviews: Issues Log Design Owner 22

23 Documentation of Commissioning Requirements Design Systems to be documented and tested. Integrate performance requirements into design. Integrate other BECx activities into design. 23

24 Documentation of Commissioning Requirements (ASTM E2813) Design = Mandatory Field Test L = Required Laboratory Test OL = Optional Laboratory Test (OF) = Optional Field Test (M) = Laboratory Pre-Construction Mock-up Test 24

25 Documentation of Commissioning Requirements Design 25

26 Documentation of Commissioning Requirements Design 26

27 Design Process Design OPR Update BECx Plan Update BECx Plan Design BOD Update BECx Plan 27

28 Pre-Construction Pre- Construction 28

29 Submittals and Shop Drawings Construction 29

30 Periodic Site Visits Construction Quality Assurance Verify compliance with Contract Documents and OPR Pre-Construction Meetings Test Coordination Issue Resolution 30

31 Mockups Construction 31

32 Periodic Site Visits Construction 32

33 Periodic Site Visits Construction 33

34 Functional Performance Testing Fenestration Air and Water Testing Construction 34

35 Functional Performance Testing Fenestration Air and Water Testing Construction 35

36 Functional Performance Testing Waterproofing Flood Test Construction 36

37 Functional Performance Testing Infrared Thermography Construction 37

38 Functional Performance Testing Whole Building Air Test Construction 38

39 Occupancy and Operations Occupancy and Operations Operations and Maintenance Manual Training Ongoing Inspections 39

40 Levels of BECx: ASTM E2813 Fundamental Engaged by DD phase Reviews OPR Identifies scope and budget Assists with BOD and CDs Performs at least one design review Prepares BECx Plan Direct and substantive participation in preconstruction, construction, and occupancy & operations phases Enhanced Everything in Fundamental BECx, plus: Engaged during predesign, or SD at the latest Assists with preliminary OPR Performs a minimum of three design reviews Additional performance testing 40

41 Levels of BECx: LEED v4 Fundamental (Required) Considered in OPR Considered in BOD Enhanced (2 Points) Must follow ASHRAE and NIBS Guidelines Review submittals Systems manuals and training Seasonal testing 10 month post occupancy review On-going BECx plan 41

42 What is Building Enclosure Commissioning? Building Enclosure Commissioning is a process that begins with the establishment of the Owner s Project Requirements and endeavors to ensure that the exterior enclosure and those elements intended to provide environmental separation within a building or structure meet or exceed the expectations of the Owner as identified in the OPR. (ASTM E ) 42

43 What the Commissioning Process is NOT A replacement for good design commissioned buildings can have problems if design is inadequate. Something that just anyone should undertake qualified and experienced staff is necessary. A series of checklists. Just field testing installed systems. Something done just to fulfill a LEED prerequisite. 43

44 Role of the BECxA Enclosure Consultant Designer Other Designers Owner Subcontractors Contractor Enclosure Consultant BECxA 44

45 If I have a Consultant, do I need a Commissioner? Enclosure Commissioner Independent Third Party Involved Throughout Design and Construction Enclosure Consultant May be Retained by Owner, Designer, Contractor May Not be Involved until Later in Project 45

46 Where s the Value in BECx? The Process. Pre-Design Most effective time for BECxA to become involved Schematic Design Latest BECxA to be engaged for ASTM E2813 Enhanced Commissioning VALUE OF BECx Design Development Construction Documents Pre-Construction Latest BECxA to be engaged for ASTM E2813 Fundamental Commissioning Time at which many projects start to engage BECxA Construction Occupancy and Operations PROJECT TIME 46

47 Where s the Value in BECx? The Tasks. Pre-Design Develop OPR Design Critical Reviews Pre- Construction Mockups and Testing Construction QC Field Testing Occupancy and Operations 47

48 Mechanical Systems Commissioning 48

49 Building Enclosure Commissioning 49

50 Building Enclosure Commissioning 50

51 Where s the Value in BECx? Higher level of quality assurance = improved performance = reduced risk. Potential for risk reduction increases with complexity of building enclosure systems and materials. Project without BECx VALUE RISK Project with BECx PROJECT COMPLEXITY 51

52 Thank you. Questions? Jeffrey D. Kerr, P.E. Senior Project Manager Brian S. Rose, P.E., LEED GA Staff II SIMPSON GUMPERTZ & HEGER 52