Simplifying Deep Building Retrofits with Integrated Systems – 2020 Greenbuild Session Review

ChuckLohre Aptera, Greenbuild

Our editorial review, “This presentation reviewed the typical efforts to save energy in commercial buildings. The Contemporary Arts Center we are volunteering to help with, doesn’t fit into a landlord and building resale life cycle. We did learn about the incentives California utilities provide, we’ll be reviewing these with Duke Energy. There were some pilot programs that the CAC may be eligible for, but we still need to have some fundraising to budget the projects. Some discussion about zero-carbon is included but primarily the message was the sooner you make energy improvements the better. The CAC could maybe save $150,000 per year, a little less than half of our facility budget, if they invested a million in an energy recovery unit and better humidity control. Payback would be in about twelve years. They’ll be around a lot longer than that and could certainly put those funds to better use immediately! Get in touch if you would like to help.”

Integrated systems approaches are essential for deep energy efficiency. Indeed, they are a given for any net-zero building. However, they are challenging to implement in existing buildings due to the required level of expertise and effort to address them under existing conditions.  Simply put, it is not easy to implement integrated systems solutions in building retrofits and this hinders achieving deep energy savings across the wider building stock.

We need to make integrated systems easy and routine to enable more deep energy efficiency retrofits.

Toward that end, this session will present real-world examples, strategies and tools to make integrated systems for deep energy savings the easier option and norm in building retrofits, and thereby enable wider adoption in the industry.  This includes two key elements: a) standardized packaged solutions that minimize the level of effort and expertise required; and b) strategies to integrate design and installation with real estate business lifecycle events, such as during tenant fit-out, or at the time of building renovation.

The session includes four rapid-fire presentations:

1. An overview of four integrated systems packages (ISPs) for office building retrofits with streamlined applications.  These are tailored to pair with planned tenant fit-outs, rooftop unit replacements, and whole building renovations.

2. Strategies to achieve “zero over time” in individual buildings and portfolios, by opportunistically integrating deep efficiency measures at the time of building sale,  tenant turnover, major renovation, end of equipment life, and during ongoing  operations.

3.A validated set of cost effective net-zero renovation strategies and case study for a small commercial office building using a simplified assessment method.

4. How to effectively leverage utility incentives and resources for integrated system solutions in net-zero energy retrofit projects.

Attendees will leave with actionable information to expand the scope and reach of integrated systems beyond the few, to the many.


Summarize the need for and challenges to implementing integrated systems to achieve deep energy savings in existing buildings.

Describe how to use standardized packaged solutions to reduce the level of effort for implementing integrated systems; and application contexts.

Explain how to align and incorporate deep energy savings retrofits into real estate business life cycle events.

Explain how to effectively leverage utility incentives and programs for integrated system solutions and net-zero energy.




Paul Mathew
Staff Scientist
Paul Mathew is a Staff Scientist and Department Head of Whole Building Systems at Lawrence Berkeley National Laboratory (LBNL), where he conducts applied research and market transformation activities on energy use in buildings. His current work is focused on integrated building systems, energy epidemiology, benchmarking tools, and energy-related risk analysis. Prior to joining LBNL, he worked at Enron Energy Services and the Center for Building Performance at Carnegie Mellon University. He has authored over 100 technical papers, articles and reports. He received a U.S. presidential award for federal energy efficiency in 2007. He has a Bachelor’s degree in Architecture, and a Ph.D. in Building Performance and Diagnostics from Carnegie Mellon University.

Relevance to topic: Paul Mathew has several projects collaborating with industry partners on developing and testing integrated systems for deep energy retrofits in commercial buildings. He is passionate about solutions to broaden the adoption of energy efficiency in buildings.


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Matt Jungclaus
Rocky Mountain Institute
Matt Jungclaus is a professional engineer and a manager with Rocky Mountain Institute’s buildings program. His work drives the adoption of low embodied carbon, net-zero energy, and grid-interactive buildings. Matt’s recent efforts have focused on the economics of grid-interactive energy-efficient buildings, creating the “Zero Over Time” approach for moving real estate portfolios to net-zero energy while minimizing up-front costs, and working with district-scale net-zero energy developments to achieve their goals cost-effectively. Matt has also spent time developing city-level policy and synthesizing city and regional policy best practices into “The Carbon-Free City Handbook” and “The Carbon-Free Regions Handbook”. Matt’s past work at RMI includes developing a net-zero energy strategy for the McDonald’s Corporation and delivering integrative design workshops for federal and private sector clients.

Prior to joining RMI, Matt worked for CEG Solutions as a technical analyst and a project manager for federal energy efficiency projects.

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Cindy Regnier
FLEXLAB Executive Manager
Lawrence Berkeley National Laboratory
Cindy is the Technical Leader for Commercial Building Systems and FLEXLAB Executive Manager at Lawrence Berkeley National Lab. FLEXLAB (Facility for Low Energy eXperiments in Buildings) is Berkeley Lab’s series of experimental testbeds focused on R&D of integrated systems, distributed energy resources and grid enabled controls. She also manages several research projects focused on deployment of low energy systems and technologies. These include the development of integrated systems incentive programs for utilities, and solutions focused on small commercial buildings. Prior to joining LBNL in 2009, she spent 13+ years on design of innovative, integrated HVAC systems, including AIA COTE Top 10, LEED Platinum buildings, and a 200,000sf carbon neutral science museum. Her Bachelor’s degree is in Mathematics and Mechanical Engineering from Queen’s University, Canada, and she holds professional engineering licenses in California, USA and Ontario, Canada.

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Lisa Hannaman
Senior Account Manager
Southern California Edison
Lisa Hannaman is a Senior Account Manager with Southern California Edison’s Business Customer Division in the Government Institution Agriculture Water group. She has lead oversight and partnership with the State of California Portfolio for Southern California Edison which includes UC/CSU, California Community Colleges, California Department of Corrections and Rehabilitation, and the State of California. She is also the co-lead on the first ever Clean Energy GHG based incentive program available to a pilot customer base. During her time with SCE, she has been responsible for overseeing a portfolio of Strategic and Energy Intensive customers spread throughout SCE’s 50,000 sq. mile territory. She has had significant success with assisting customers with their goals in the areas of energy efficiency, energy resiliency and emission reductions. She is an active member of several key customer groups and committees in the State of California. She has her Bachelor of Science Degree from California Polytechnic University, Pomona.

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By Chuck Lohre, Editor Green Cincinnati Education Advocacy

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