OPR: The Underappreciated Path to Success

Posted by Jennifer Chiodo on Oct 10, 2018 12:00:00 PM

 

I looked back through our blog history and realized I have never written about the importance of a lovely little document called the Owner’s Project Requirements, or OPR for short.  An OPR is created through collaboration with many involved parties; it synergizes everyone’s ideas into one goal-focused document. At Cx Associates we are such believers in defining the goals and criteria for project success that we often develop OPRs even for internal business improvements to help focus and guide the process.  

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Topics: Building Cx & Design Review

Keeping Cool in the Modern Era: R-22 to R-407C

Posted by Tate Colbert on Sep 26, 2018 12:30:00 PM

The best time is now to replace an old R-22 refrigerant system with an environmentally-friendly alternative.

For better or for worse, we no longer live in the days of hairspray. Our ’do’s style may have suffered slightly, but our environment

 has benefited greatly. When the Montreal Protocol was signed by the United States in 1987, it set a goal of reducing emissions of ozone depleting chemicals, and it has experienced some success…I hope you all celebrated World Ozone Day this month on September 16th! Many people may be blissfully ignorant of the changes to their aerosol products in the last 30 years thanks to the Montreal Protocol, but in the HVAC/R industry, we’re continually aware.

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Topics: Building Performance & Technology, Sustainability

Why Design Review Is Crucial

Posted by Thomas Anderson on Aug 29, 2018 10:00:00 AM

We often hear a question that goes something like this from building owners: “Why do I need an independent design review? I hire the best architects and engineers.” It’s a reasonable question — asked so often in my opinion because those of us in the architecture, engineering and construction industries have done such a poor job answering.

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Topics: Standards and Metrics, Building Cx & Design Review

The Case for Small, Local Engineering Firms

Posted by Jennifer Chiodo on Jul 26, 2018 4:29:30 PM

My business partner, Matt Napolitan, and I each spent 10 years working at major, international engineering firms. I worked for Syska Hennessy Group (11th nationally ranked) in their San Francisco office and Matt worked for Buro Happold (14th nationally ranked) out of their New York office. We now operate a 12-person engineering consulting firm in Burlington, Vermont. We know both large, big-city engineering and local, Vermont engineering.

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Topics: Building Cx & Design Review, Public Policy

Project Management Basics – Five Rules for Successful Additional Service Requests

Posted by Jennifer Chiodo on Jul 19, 2018 3:31:59 PM

The first project that I managed as a young engineer was a tenant fit-up for a high-rise building in San Francisco.  Through a variety of random events, as a 22-year-old electrical engineer, I became the project manager as well as the project engineer for over 30 floors of mechanical, electrical and plumbing design for an oil company building out of its new west-coast headquarters.  Early on, I recognized that our fees were based on a limited scope of work and, as the client changed what they wanted in the space, I needed to make a case for the additional effort necessary to provide the services needed for the fit-up.  In some cases, it’s obvious when a project exceeds the contracted scope of work; for instance, the client added a large data center that required a code variance (another blog topic perhaps).

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Topics: Workplace & People

Optimal Start/Stop and You’re Done, Right?

Posted by Rick Stehmeyer on Jun 27, 2018 4:26:01 PM

Optimal start/stop (OSS) is available as an out-of-the-box function in almost every HVAC building automation system sold on the commercial market today.  Folks toss the term around with a very loose understanding of what it means.  PID controls suffer the same dilemma.  When you ask any industry professional to define OSS, you’ll get this generic and common response (Figure 1):

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Topics: Workplace & People, Building Performance & Technology

Using Energy Metering to Verify Your Building's Performance

Posted by Katie Mason on Jun 20, 2018 5:37:50 PM

Today there are a multitude of energy metering devices (e.g. data loggers) available to enable the analysis of building systems functionality. There are many different types of data loggers, each with a different purpose. To get the most from your building using energy metering, you need to narrow your options with your overall goals in mind. Before we install meters on a system, whether it’s an electrical system, HVAC system, or domestic hot water system, we must first determine what type of data we need and what the data will be used for. With this information, we put together a metering plan that will produce the data necessary for the analysis. I am going to provide two specific examples of systems/equipment we metered, including why we were performing the metering, how we did it (what types of meters), and what the findings were. Both of these examples showed the equipment being metered was not working as intended.

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Topics: Building Performance & Technology, Evaluation Measurement & Verification (EM&

Introduction to Dynamic Lighting Systems

Posted by Gretchen Schimelpfenig on Jun 7, 2018 10:16:57 AM

In the mid-20th century, the lighting industry made major leaps forward with the evolution of dimming technology, which allowed users to control light levels. Today, modern lighting fixtures are equipped with digital controllers that provide many new capabilities that go far beyond basic dimming, including warm dimming, color-tunable, and color changing lighting options. Why and when might owners select these systems? How can engineers design them? And how can commissioning agents functionally test the equipment?

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Topics: Lighting, Lighting Controls, Dynamic Lighting

Using Market Smarts to Enhance Energy Efficiency Program Evaluation

Posted by Jennifer Chiodo on May 30, 2018 2:30:00 PM

Generating Market Demand

The purpose of energy efficiency programs is to cost effectively generate market demand for energy efficiency that would not be achieved without market intervention. An energy efficiency process evaluation investigates the effectiveness of programmatic interventions through qualitative and quantitative analysis. Marrying the analytical engineering-based approach of impact evaluation with the typically more social science orientation of traditional process evaluation can generate useful, actionable results to help program administrators improve market interventions to increase participation, depth of savings, and market transformation.
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Topics: Energy Efficiency, Evaluation Measurement & Verification (EM&

Quantifying Benefits of Passive Solar Heating Technology

Posted by Gretchen Schimelpfenig on May 23, 2018 10:42:34 AM

For eons, humans have used thick, thermally massive walls to store the heat of the day and to warm their homes at night. Due to America’s persistent dependence on fossil fuels, passive solar walls enjoyed brief mainstream popularity during the fuel crises of the mid-20th century, and residences across the country benefited from reliable, renewable heat. As gas prices declined, so did homeowner and developer enthusiasm for these low-energy systems. As we face a massive climate change calamity and most residential heating systems today are still served by volatile fossil fuels, it is time we revisit and incorporate passive solar technologies into our new buildings and renovations.

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Topics: solar energy, renewable, Energy Efficiency, Sustainability, Green Building, passive solar

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