Building Enclosure Commissioning (BECx): Practical Project Implementation

Objectives Intro to BECx, importance and benefits Similarities between BECx & typical Cx, industry standards and code mandates Implementation of BECx Lessons Learned

Outline Code & Standard Synergy Regional Priorities Why BECx Cx Process Design Construction Turnover Lessons Learned Q&A

Cx Process Guideline / Standard – Optional Implementation – Code Mandate

LEED Mandates *As of December 2011 Legislation, executive orders, resolutions, ordinances, policies, and incentives. 442 Localities (45 states) 34 State 14 Fed. ? Numerous public school jurisdictions and institutions of Higher Education.

Code Adoption of MEP Cx = CALGreen = IGCC Statewide = IGCC Local Governments * As of February 2013

BECx Process NIBS Guideline 3 – 2012 ASTM E2813 – 12 LEEDv4.0 ASHRAE Guideline 0 Guideline / Standard – Optional Implementation – Code Mandate

ASHRAE Guideline 0 “The Commissioning Process is a quality- oriented process for achieving, verifying, and documenting that the performance of facilities, systems, and assemblies meets defined objectives and criteria.”

NIBS Guideline “Commissioning the enclosure differs from commissioning other building systems … The enclosure is designed and field assembled from numerous materials with varying properties. These materials are manufactured by different companies… assembled …by many different tradespeople, working for different contractors … in all possible weather conditions with the intention of meeting well defined performance criteria.”

ASTM E Standard Practice for Building Enclosure Commissioning “BECx is a process that begins with the establishment of the (OPR) and endeavors to ensure that the exterior enclosure … meet or exceed the expectations of the Owner... A fundamental understanding of … ASHRAE Guideline 0 and NIBS Guideline 3 is recommended for optimal use and application of this practice.”

USGBC LEEDv4.0 Certified - 25% Silver - 43% Gold - 54% Platinum - 84% Overall - 46% Energy & Atmosphere Credit 3 Option 1 (3-4 points) – Enhanced Systems Cx AND/OR Option 2 (2 points) - Envelope Cx

“Commissioning of the building envelope can identify areas of concern related to air infiltration and leakage, moisture diffusion, surface condensation, and rain water entry – all issues that can negatively impact the building's energy performance and indoor environmental quality” Why?

White = heat loss Why?

ICE

Full of Water Why?

Courtesy of Atlas Roofing;

Cx Process

OPR/ BOD/ Cx Plan MEP items that are also specific to enclosure: Interior and exterior temperature, humidity, insulation, wall R-values, window U factor, SHGC, warranties. Are the requirements concrete or abstract? Are the requirements enforceable? Glazing parameters (amount, views) Air leakage Annual Rainfall Architect plays bigger role Enclosure Testing

Specifications General Cx Requirements Project Team Responsibilities Testing Requirements Mockup Vs. In-Place Air and Water infiltration Thermal Performance Material Performance Properties

Design Reviews Review For: Integrity and Continuity of: Air Barrier Vapor Barrier Thermal Resistance Plane Moisture Resistance Plane Constructability Other OPR items

Design Review Design Reviews

Submittal Reviews

Pre-Functional Checklists

Site Observations

Functional Performance Testing

Turnover O&M Manual Review: Sealants, roofing, glazing Re-Commissioning not as robust Maintenance of Enclosure Systems Training Warranty Review

Lessons Learned Scheduling Tracking Coordination Lack of Participation Lack of Authority Design team being tied to schedule

That’s All Folks… Brian Davie, AIA LEED AP | Senior Sustainability Manager Farnsworth Group, Inc. 200 West College Ave., Suite 301 | Normal, IL p , ext. 207 | f | c | Joshua Hickman, LEED AP BD+C, CxT | Sustainability Technical Manager Farnsworth Group, Inc Haven Ave., Suite 117 | Rancho Cucamonga, CA c |