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ZeroEnergy.com
Newsletter
June, 2007- Vol 2, Issue 4
 
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Greetings!

Our goal for the newsletter is to provide you with information on topics related to energy efficient and healthy homes. We hope you enjoy it, and we look forward to working together on your next home design.

Sincerely,

David Wax, CEO, Independence Energy Homes

In This Issue - click on a title below
IEH Featured Design - Modern Industrial
Planning Your Green Home
Four Near Zero Energy Test Homes
The Green Studio Handbook
IEH Featured Design
modern industrial ext smallModern Industrial
Brevard, North Carolina

 
- 1,000 Square feet

- 2 Bedrooms

- 1 Bathroom

- Picture Windows Open to Patio

- Radiant Heat

- Polished Concrete Floors

 

 

The Design

 

Simple, uncluttered design and nearly room-height windows make this small home feel large and spacious, inviting in views of the Blue Ridge Mountains and surrounding forests. The industrial style uses glass, polished concrete, and metal, all of which keep costs low while creating a sleek, modern look.

 

Energy Efficient

The energy design of this house is as streamlined as its look. Passive solar techniques, such as proper orientation, window overhangs for shading, and glass optimized for daylighting, work to reduce the home's energy needs. These features, coupled with a right-sized heating system, on demand hot water, and Energy Star appliances create a stunning modern space with fantastically low utility bills.

Green Aspects

Reclaimed industrial components provide finish details, such as closet shelving, while corrugated recycled aluminum is used as cladding on the exterior. Low-flow plumbing fixtures help reduce overall water use. The design makes such efficient use of space that material inputs are reduced, giving this smart and spacious home a very small eco-footprint.modern industrial int medium

Healthy Living

Polished concrete floors with a radiant floor heating system leaves allergens and dust nowhere to hide. This improves the indoor air quality and allows for easy cleaning. The large glass doors open up to the outside, thoroughly ventilating the space, providing natural light, and merging the outdoor and indoor living spaces.

Planning Your "Green" Home

 

Building a new, energy efficient or green home can be a confusing process given the numerous options offered in magazines and on web sites. Knowing how to prioritize these choices can be helpful in deciding which are most appropriate for you.

 

Historically, many of our firm's clients have shared common concerns. With this experience, we've developed a brief guide that prioritizes how to evaluate options that come along in the design process:bamboo

  1. Healthy indoor air quality
  2. Building envelope and energy efficiency
  3. Local conditions
  4. Renewable energy
  5. Green materials

 

Healthy Home, Healthy You

 

healthAttention to the quality of indoor air is important for the health of the home's occupants. Conscious choices during the planning and construction of your home regarding both materials and systems can yield a healthy environment for years to come.

 

Wood or polished concrete floors help maintain indoor air quality since, unlike carpet, they don't trap dust and dirt in your home. If you prefer carpet, then be sure to install with a non-toxic, low emitting VOC (volatile organic compound) adhesive.  Another carpet option is to use an organic (pesticide-free) fiber carpet.

 

VOCs have traditionally been included in other building products, such as fiberglass insulation, paint, and particleboard.  Today, many low or no-VOC alternatives are available for each of these materials categories.

 

Indoor air quality is a major concern, especially when a home has a tight, energy efficient building envelope (discussed in the next section).  With a tight building, adequate mechanical ventilation and filtering is necessary to purge any naturally occurring indoor air pollutants such as smoke, air-borne bacteria, odors, and dust.

 

Building Envelope and Energy Efficiency

 

energy charts code and IEHNext in priority is to ensure that the building envelope and appliances are as energy efficient as possible.  (For the tech fans, don't worry--the high-tech things, like solar panels, are discussed later.)

 

Building envelope efficiency can be improved via low-cost enhancements such as better insulation, insulating window shades, high efficiency windows, and house orientation.

 

Beyond the envelope, efficiency in the home's appliances (via Energy Star rating) make a large impact in how much energy is drawn to operate them.  The home's HVAC system should be properly sized by an engineer to ensure it is not too big or too small for your needs and operates at peak efficiency.  Lastly, efficient lighting such as CFLs use substantially less energy than conventional incandescent bulbs.

 

Look to Local

 

hurricane tieThe next step in planning a new home is to think local. Most areas have unique local needs that differ from the rest of the country. Tailoring a design to the attributes of a specific location can be very important.

 

In areas prone to hurricanes, additional construction measures, such as steel reinforcements (left) or construction methods like insulated concrete forms (below), can make the house more resilient to high winds and flying debris.

 

For those areas where water is scarce such as the Southwest, low-flow water fixtures, "grey water" recovery systems, and rain water capture can all be considered. icf pitts

 

Lastly, construction materials from a nearby source can make a home more "green". Many areas have architectural vernaculars that are strongly influenced by the local materials; well-known examples are the field stone houses of Pennsylvania, adobe ranches in the Southwest, and log cabins of the North.

 

Energy Production

 

Only after optimizing the energy performance of a building's envelope does it make financial sense to consider a renewable energy technology.

 

Solar electric and thermal systems capture energy from the sun, reducing reliance on electric and gas utilities and their associated utility bills. Wind-powered turbines can provide electricity, but only work well in locations with steady winds year round; they also face maintenance issues due to the mechanically-intensive nature of the technology. Ground source heat pumps can provide space conditioning in any location and are typically economical.

 

Green Finish Materials

 

bamboo floorRapidly renewable or recycled materials can also be used during construction. Bamboo floors, for instance, are both a beautiful and sustainable material. Natural fiber or bamboo window treatments add style without compromising health. Recycled glass can be used for tile backsplashes as well as tub and shower finishes.

 

In Closing

 

For those who have had difficulty deciding where to start during the process of building a new home, we hope the suggestions above have been helpful. Priorities can be a very personal thing, and these are meant to serve as guidelines when identifying what is important to you.

 

The Details of Four Near Zero Energy Test Homes
ORNL logoIf you are interested in the details of energy efficient construction and performance, this late 2005 study documents four experimental houses built from 2002-2004. The study was conducted by Oak Ridge National Laboratory in collaboration with the US Department of Energy's Building America Project and Habitat for Humanity.

"An essential principle of the zero-energy design and building process is
whole-house integration-careful planning to make all the components work
together to achieve maximum energy savings."

The four near zero energy homes were all constructed using SIPs, with HVAC systems of differing efficiencies, different hot water systems, 2kW of solar
electric panels, and energy efficient appliances.

Through extensive monitoring, the study showed that the houses achieved
levels of energy efficiency that were 50-57% greater than that of a similar
home that met Model Energy Code standards, which are already 20% higher
than the average similar American home. For each home, the study provides details on basic floor plans, a year-by-month breakdown of energy use, systems specifics, and HERS scores.

To read the entire study, click here.
The Green Studio Handbook
Green Studio Handbook
IEH is pleased to report that Architectural Press' recent release of The Green Studio Handbook contains an extensive case study regarding the 2005 Cornell Solar Decathlon House. The founding members of Independence Energy Homes led the team which designed the home and its systems, and then constructed it on the National Mall in Washington, D.C.
 
 

The Green Studio Handbook is a wonderful resource for environmental strategies in design, with real world case studies to support the discussed concepts.  Buy the book at Amazon.com


 
We hope this newsletter was helpful and educational for you. We are already working on the next issue. Please feel free to call or email with any questions or ideas for the newsletter, or about our firm's services. We'd love the opportunity to design your next home!
 

Sincerely,

The Independence Energy Homes Team