Who is Responsible for Low Energy Code Requirements for Lighting?

Posted by Jennifer Chiodo on Mar 14, 2018 2:00:00 PM

I have repeatedly blogged about my concerns with the current and future energy codes because the codes are not keeping up with technology for lighting efficiency (see my previous blog posts titled “Why are Lighting Energy Standards Decreasing” and “More Issues with the Energy Code – Lighting is Running Rampant”).  The graphs below, developed by our friends at Optimal Energy, show some comparisons of Department of Energy (DOE) predicted efficacies for lighting technologies and the efficacy needed to meet code for some common space types.

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Topics: Public Policy, Standards and Metrics, Building Performance & Technology

The Case for Monitoring Outside Air Flow in Hospitals

Posted by Walker Calderwood on Mar 7, 2018 10:05:00 AM

It can often be an afterthought as to how much outdoor air (OA) is actually being drawn into a hospital through air handling equipment, but maintaining proper outdoor air volume is a vital part of achieving effective infection control, as well as meeting space pressurization requirements.  Proper OA volumes are also a metric that can be reviewed for non-compliance during Joint Commission audits.  The amount of outside air that a hospital’s air handling equipment should introduce into the building is defined by the ASHRAE Standard 170, which was discussed in one of our previous blog posts, Optimizing Air Handling Units for Healthcare. As we pointed out in this prior post, an airflow station, when properly selected and installed,  is an effective piece of hardware which can be used to monitor this outside air quantity (typically in cubic feet per minute), and the data provided by this meter can be very useful in a healthcare setting.

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Topics: Workplace & People, Building Performance & Technology

Better Buildings by Design 2018: A Commissioning Agent's Experience

Posted by Daniel Tuhus-Dubrow on Feb 28, 2018 3:47:18 PM

The Better Buildings by Design conference took place a couple of weeks ago here in Vermont. The two-day conference brings together contractors, utility representatives, architects, engineers, and other energy professionals to discuss energy efficiency, durability, and operations and maintenance for residential and commercial buildings. It included sessions across multiple subject tracks, workshops, and a trade floor with many exhibitors, and offered a great opportunity for learning about new developments in the field and networking with fellow energy nerds. Cx Associates had a strong attendance at the conference, with several of us presenting in multiple sessions. 

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Topics: Building Performance & Technology

Building Retrofits: The Retrocommissioning Approach

Posted by Jennifer Chiodo on Feb 21, 2018 1:28:36 PM

If you're the owner or manager of an older commercial building, you may wonder if retrocommissioning is right for your building retrofit. You are not alone.

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Topics: Building Performance & Technology

Open the Mines! Let’s Start the Dig for Data and Improve Building Performance.

Posted by Rick Stehmeyer on Feb 14, 2018 10:23:00 AM

Despite the fog’s best efforts (diverting my schedule three hours by car outside of Chicago), I  made it to the 2018  ASHRAE Expo . For those who don’t know what the ASHRAE Expo is, you can think of it like a  Comic-Con, but for Heating Ventilation and Air Conditioning (HVAC). There is a huge exposition where products are shown off and the latest in energy efficiency technology is pandered off in a bazaar filled with old friends from across this global industry.

I attended six talks, a few open panel discussions, an ASHRAE GPC36 Committee meeting, and topped the days off by making new friends and “nerding out” over HVAC. I chose to attend panels and presentations that had to do with controls, integration, and grid management because that’s where I believe we can easily continue to chip away at excessive energy consumption due to poorly controlled building HVAC systems.

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Topics: Building Performance & Technology

2018 Resolutions: Goals for the Building Commissioning Industry

Posted by Gretchen Schimelpfenig on Feb 7, 2018 11:15:00 AM

Forty years ago, the practice of commissioning systems to ensure buildings deliver functionality and comfort for owners and users originated in Canada. Twelve years later, ASHRAE debuted Guideline 1 for the commissioning (Cx) process. For twenty years, the U.S. Green Building Council has included commissioning in LEED documentation, and in 2014, LEED v4 was released, requiring fundamental Cx, including design review, for all new construction projects seeking certification.

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Topics: Building Cx & Design Review

Impressions of Colombia: Farming, Fair Trade, and the FARC Peace Treaty

Posted by Eveline Killian on Jan 24, 2018 1:30:00 AM

I recently had the privilege to travel to Colombia with Engineers Without Borders to assess the needs and resources for an irrigation project for family farms.  Colombia is very well suited for coffee and sugar cane, but the dry season is too harsh for more sensitive plants like basil, lettuce, spinach, and peppers.  For this, farmers need drip irrigation, water catchment, water reservoir, and water diversion.  Our group’s goal is to develop an affordable, sustainable, and replicable design as a pilot project for ten farmers in central Colombia.  We are working with Food 4 Farmers, an international non-governmental organization (NGO), Nueva Realidad, a Bogota based NGO, and Nuevo Futuro, the local coffee cooperative.  We knew what our goal was before we started, but we had no idea what to expect from the trip.  Here are our impressions of the country with which our team returned.

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Topics: Sustainability, Public Policy, Workplace & People

Using Opposite Season Testing to Protect the Integrity of Your HVAC System

Posted by Ben Fowler on Jan 17, 2018 9:07:00 AM

During this recent cold-snap in the northeast, you can be sure that HVAC contractors were some of the busiest people around. Inevitably, when outdoor temperatures reach what are called “design-day” conditions, (the days with the highest expected heating or cooling loads a building can experience for its local climatic conditions), HVAC systems are put to the test. It is not uncommon for problems that are not obvious at lower temperatures to suddenly arise - sometimes leading to system outages, frozen pipes, and worse - exactly when you need your HVAC system the most.

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Topics: Building Cx & Design Review

Retaining Energy Savings, and Snowflakes

Posted by Rick Stehmeyer on Dec 29, 2017 4:40:00 PM

Wilson “Snowflake” Bentley was born in my home town of Jericho VT in 1865.  My town is situated in Vermont in a unique way that allows for a lot of annual snow (by Vermont standards).  Not only does Jericho get a lot of snow, but we also seem to be situated in such a way that we get perfect snowflakes that don’t clump together.  This is what allowed Mr. Bentley to become one of the first known photographers of snowflakes. He invented his own way of catching flakes using black velvet, so they wouldn’t melt or evaporate before he could get a picture of them. 

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Topics: Sustainability, Energy Efficiency

The Role of Commissioning for Industrialized Construction Projects

Posted by Gretchen Schimelpfenig on Dec 6, 2017 2:52:00 PM

As buildings become increasingly complex and codes require more verification of performance, commissioning is as valuable as ever. “Savvy building owners recognize the gaps in the current design and construction process and the impact they have on the ability to achieve increasingly higher performance requirements” said Ryan Corker of the National Institute of Building Sciences in a November 2017 roundtable for the ASHRAE Journal. The Journal Editor asks: “Why is commissioning necessary if we have professionals designing buildings…shouldn’t everything just work correctly?”

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Topics: Building Cx & Design Review

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