Getting to Zero - White Paper on Zero Energy and Net-Zero Buildings and Homes

Happy Earth day! I hope you're finding interesting ways to celebrate it in your community.  Here's a way to celebrate online.  Check out this interesting white paper from Building Design and Construction.   For readers in the building industry, architects, homeowners, building committee members, facility planning professionals, construction professionals, building owners and engineering consultants it covers an important trend towards zero energy or low energy usage buildings helpful in fighting global warming and green house gas emissions.

Is Net-zero energy the next frontier in green building?  I'm not sure about that.  But the BD+C paper addresses this by sharing an overview of what does zero energy mean and how it can be applied to various situations.  There are numerous complex definitions which it takes into account and some very useful graphics which make it easier to understand.  It doesn't necessarily talk about the Passive House movement from Europe also penetrating the green building discussions but it's an important addition to the conversation of moving towards energy independence!

Bill Maclay, a leader and inspiration in net-zero design (and my former boss) was quoted in the white paper as well and their work with the Putney School has been mentioned on page 14 for the Putney Fieldhouse a fabulous example of a net-zero LEED platinum private school athletic building really changing the game on campus facilities.  I was part of the design team on that project and am really proud of being part of it.  If you're ever in southern Vermont and are curious about seeing the building contact the Putney School to arrange a tour.  It's a game changer, leaping out of the pages of the white paper into everyday experience showing the way towards a more energy-independent future along with the other case studies mentioned.

Take a look at the white paper and let me know what you think.  Do you have any examples where you live of similar zero-energy buildings you'd like to share with readers?  Any great experiences related to them to share with us on this special day?  This is important work to help out the generations who will follow us.  With net-zero energy buildings, we can make a difference for tomorrow and beyond! 

Next Steps

If you’re intrigued, let’s discuss adapting this white paper or aspects of it to create your dream home. Let’s design and build a place and space that reflects your style and values while honoring Vermont’s landscapes and sustainable living ethos. Contact us to begin this journey! 

You can find us at Arocordis Design, our residential architecture firm's website. Our home studio is located in Montpelier, Vermont. Happy to connect.  

Passivhaus to Our Haus?

Why the funny post title?  Well, I went to a conference last week in Burlington and came away wondering if the Passiv Haus movement is really accessible to the mainstream.  It's a play on words because I attended a presentation about a house which was titled "From Bauhaus to Passivhaus".   I commend conference planners for bringing together professionals with their case studies working on opposite ends of the spectrum; designers working for the rather wealthy 'spare no expense group' and those working with Habitat for Humanity,' let's figure out how to do this for everyone group'.  Somewhere in the middle we shall meet.

At last week's Better Building by Design Conference hosted by Efficiency Vermont I saw a handful of presentations showcasing Passiv Haus projects and their innovative design process as well as other super low energy net zero possible homes and projects.  I learned there is a little bit of controversy for some reason going on now in our community between engineers, architects and building scientists about how low is too low or over the top excessive in home design and performance.  And finally, how can Passivhaus and low energy/ net zero home design early adopters help move the residential marketplace toward a more positive energy efficient and resource conserving position?  How can they replicate and expand the learning and experiences upto a community and regional scale?  That's what it's all about.  How we can help soften the hard landing for coming generations Bill McKibben lately of the book Eaarth forecasts in our coming shared future? Well I now have a deeper understanding, albeit brief, of many of the issues at hand and passions uniting them.  And yes, there are some answers and there is hope.

What did I see and hear then...?
One was a renovation of a not so historic early modern Connecticut home designed by Ken Levenson of Ken Levenson Architects, P.C.  Another was a Habitat for Humanity home designed by J.B. Clancy of Albert, Righter & Tittmann Architects, Inc. who designed it in collaboration with Peter Schneider from VEIC (the mother company of Efficiency Vermont) and Preferred Building Systems out of Claremont, NH.  I also attended a spectacular presentation by  Marc Rosenbaum from South Mountain Company, a noted energy design consultant here in the northeast and Building Science Corporation's Kohta Ueno who did a great job standing in for John Straube who was unable to be there last week.  They started out as if they needed boxing gloves (actually not really...they're very kind and balanced engineers) but in the end there was much more agreement than consternation.

Where do I start...

Net Zero Low-Income Modular Homes in Colorado

I wanted to spread word of a model net-zero affordable housing project located in Lafayette, Colorado, a city located in Boulder Country about 40 miles from Denver and 10 miles from Boulder.

(image courtesy of BCHA)

The Paradigm Pilot Project, a single family home and a duplex showcase a mix of super-insulated building envelopes, smart site orientation and use renewable energy sources, combined with passive solar design strategies. The building design use a fairly straightforward modernistic vocabulary of 13 rectilinear boxes easy to manufacture in a factory setting. What's hopeful is this is an experiment of sorts to be studied and leveraged into a much larger 153 Unit housing project in the planning stages in Lafayette. It uses geothermal

The project was designed by HB&A Architects,and built by All-American Homes for the Boulder County Housing Authority. The National Renewable Energy Laboratory / Department of Energy were also partners on the project.

You can find out more about the project on the Green Building Advisor and later covered at Jetson Green. You can see helpful information about it at the Housing Authority's Website.

Here's a link to a powerpoint about the project from the BCHA site. The site also shows the construction process with highlights being the installation of the modular factory built units and solar system installation. One interesting note is the project used both evacuated tube type solar hot water and solar electric panels as part of the system. The jury's out here on the efficacy the evacuated tubes but it's interesting this technology was used on the project.

All in all, this project is an inspiration to those of us in cold-climate regions and of use to others close to home here in Vermont. Perhaps some of the lessons learned from this project can be used here on our affordable housing projects. I know Efficiency Vermont is doing it's best to partner with other non-profit and for profit developers and housing authority's to continually upgrade our housing stock, whether new construction or renovation. It's Multi-family Housing Design Checklist is a very thourogh guide helping with efficiency measures and low-energy usage. They also provide financial incentives and technical assistance to clients and project teams to extend the value of the check-list.

Perhaps with the far-away inspiration of the Colorado example and the close to home specifics of the Efficiency Vermont's checklist this will help move us forward!

Getting to Zero: Aspiring to the Zero Energy Home

Going into the new year I'm naturally in a reflective mood. What can I do to impact the greater world as we head into the unknown promise and potential of a new year? Sharing ideas which matter is a place to start!

What if more Zero Energy Homes became more prevalent in the coming year? What's a Zero Energy Home you ask? It is a home which produces the same or more energy than it uses over the course of a year. The specific design and make up of the Zero Energy Home adapts to its regional and micro-climate, siting and the needs and budget of individual homeowners. There is no single solution but rather a common approach to design which starts with shifting behaviors and motivations of all those involved.

A Zero Energy Home is valuable for a number of reasons. It can be an extremely comfortable, healthy and pleasant place to live. It can be carbon-neutral and good for the environment. It also can deliver future energy cost predictability by committing to upfront investments in a super-insulated building envelope, high performance internal heating / cooling systems, renewable energy sources, energy star appliances, lighting and healthy interior materials/ furnishings. As we head into the new year we don't know what our energy costs will be going forward but know intuitively they will continue to escalate with fossil fuel scarcity and growing demand. (See IHS Data, DOE calculator). There will be no magic energy solution I believe. Just hard slogging...

Thus, Zero Energy Homes can form part of the solution going forward, reshaping how we think about our homes into long-term investments which steady-state our energy costs into the future. Their lighter footprint on the earth and in our communities can only be an asset to strengthening them.

How and where does one start?

Read as much as you can: Visit informative web-sites such as....

• Building Science Corporation and it's information on Low-Energy Buildings.
• The Dept. of Energy's Building America website and it's Building Technologies Program has superb and accessible Builder's Guides which are organized by regional climatic zones.
• National Home Builders Toolbase site and it's Seven Steps to a Zero Energy Home.
• Oak Ridge National Laboratory and it's insulation fact sheet. It's a little clunky but useful.

Hire and Organize a Great Integrated Design Team: Contact your local American Institute of Architects (AIA) and Homebuilder's Organizations and look for standout professionals who have experience designing and building low-energy use and/or zero energy homes. They can assist you in early stages of site selection, construction strategies and project delivery methods which best adapt to your needs, budget and schedule. Depending on your project's complexity and your goals your Architect may suggest hiring an Energy Consultant and other specialized sub-consultants/ team-mates to really look at your needs and help optimize building envelope, heating-cooling systems, lighting, building controls and interior design.

Be Prepared to Learn and Grow Over the Course of Your Project: It's a journey with lots of learning along the way and exposure to new ideas and concepts. With the right team, it will be an enjoyable and never dull experience!

Investing in the Future: Remember, you're doing something which will benefit generations to come by looking beyond the present!

Happy New Year!

Zero Energy Communities and Net Zero Homes

Are homeowners across the U.S. interested in living in Net Zero Homes or Zero Energy homes as they are called elsewhere and or building them?

I am curious how much market demand there is right now in my Northeast / New England Region and other regions of the country for Net Zero homes. I am also interested in how much interest there is in other cold climate areas around the world. Please send me any examples of projects whether a single building or community.

A little background....A Net Zero or Zero Energy home means a dwelling which produces equal or more energy then they consume through use of active renewable energy systems (solar panels, geothermal, wind) versus passive systems (passive solar etc.) They can also be in combination with one another in small communities or even large cities. It's something businesses and institutions can do too! One very valuable offshoot of doing zero energy buildings is they by their very nature help provide economic security and predictability given the reduced impact of rising energy costs or fossil fuel future scarcity.

These homes are usally very energy efficient as a starting point but can stylistically vary widely. Please let me know what you're finding in your marketplace? Or what questions you have. I'd like to grow my network of people talking about this. I am new to this conversation. I am actually curious if this term can be morphed to become "Energy producing communitities" or "surplus energy homes" as the highest and best possibility is making buildings which can make more than they use and offer more options for locally generated power and thus more stability.

Best, Steve