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    • September

      18

      2012
    • 2061
    • 0

    Roof, Attic Design Creates Green, Climate Controlled Houses – Laboratory Equipment

    A new kind of roof-and-attic system field-tested at the Department of Energy’s Oak Ridge National Laboratory keeps homes cool in summer and prevents heat loss in winter, a multi-seasonal efficiency uncommon in roof and attic design.

    The system improves efficiency using controls for radiation, convection and insulation, including a passive ventilation system that pulls air from the underbelly of the attic into an inclined air space above the roof.

    “Heat that would have gone into the house is carried up and out,” says Bill Miller of ORNL’s Building Envelope Group. “And with a passive ventilation scheme, there are no moving parts, so it’s guaranteed to work.”

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    • September

      18

      2012
    • 2675
    • 0

    Floating passive house close to mass production

    The Dutch subsidiary of IBC Solar AG, one of the world’s leading system integrators for photovoltaics, has helped bring AUT-ARK home, a floating passive home, a step closer to mass production. A prototype of AUT-ARK is currently anchored in Maastricht (Netherlands) and draws a huge number of interested visitors during its opening hours due to its unconventional construction design.

    IBC Solar B.V. provided its support for the planning, technical design and installation of the photovoltaic system for this unique, future-oriented project, which is powered by a total of 24 photovoltaic modules with a total output of 6,360 Wp (watt peak), an inverter and a solar energy storage unit.

    The home was designed by Pieter Kromwijk (Architectuur Coenegracht & Kromwijk, Maastricht) focusing on minimum energy demand, and is currently anchored in Maastricht. The prototype took nine months to build, and IBC Solar explains that “owing to the considerable interest shown, the floating passive home will soon be going into mass production. Then each home will only take 4 months to build”.

    “The AUT-ARK Home is a perfect example of how the homes of the future will look,” claims Peter Meijers, Managing Director of IBC Solar B.V. in the Netherlands enthusiastically. Once it has been anchored at its mooring, the passive house does not need to be connected to a waterside power supply – electricity and water are produced and treated by the home itself.

    “This is of particular interest in those areas where there is an abundance of rivers and lakes and only limited housing space. This problem could be solved with the passive house, which offers a new, self-sufficient living space,” explains Meijers. Thanks to its innovative construction and self-sufficiency concept, the floating passive home is ten times more energy-friendly than a conventional home of a comparable size.

    Peter Meijers was immediately convinced of the idea of the self-sufficient home and offered his advice in designing the power supply from the very beginning. The planning stage of the project was quite complicated. For example, the construction plans for the passive home were altered several times. IBC Solar B.V. adapted the energy concept for each draft accordingly. IBC Solar B.V. t

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    • September

      8

      2012
    • 3092
    • 0

    New Mexican Adobe, German Efficiency Style

    I’ve seen several projects pursue both LEED Platinum and Passive House certification, but I can’t think of any that actually went through with the aim other than this Passive House, Platinum-certified home in Taos, New Mexico. The 2,400 square-foot home has three bedrooms, two bathrooms, a garage, and 1.1 acres of land with a serene, scenic view of Taos Mountain to the east, Truchas Peaks to the South, and pasture land to the west.

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    • August

      25

      2012
    • 1850
    • 0

    Atlanta considers new storm water rules as part of rainwater harvesting program

    A renewed push is underway in Atlanta to harvest rainwater and improve the management of storm water in an era of sustained drought.

    Rainwater harvesting is one proposed response to the need for better management of water resources. Credit: Southeast Rainwater Harvesting Systems Association

    Advocates say a regional rainwater harvesting program could produce more than 20 million gallons of water a day. That represents about 16 percent of metro Atlanta’s net consumptive use of about 125 million gallons a day, according to the latest figures maintained by the Atlanta Regional Commission.

    Two efforts are ramping up to improve the management of the region’s water resources: The drafting of potential new storm water regulations in Atlanta that would apply to all new homes, and to certain additions to existing homes and commercial properties; And, a renewed push throughout the region to encourage property owners to harvest rainwater.

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    • August

      22

      2012
    • 1472
    • 0

    Zero Net-Energy Ready Homes to be Certified by Energy Department Partnership

    For people who think Passive House is a Fad.

    On Monday, August 20, the U.S. Department of Energy (DOE) announced a newpartnership between the DOE Challenge Homeprogram and the Passive House Institute US to cooperate on the promotion of various levels of high-performance buildings on the path to zero net-energy.

    This news is a huge development for the passive house community and for PHIUS. The endorsement of PHIUS+ passive house certification through the DOE instantly makes passive house the most energy efficient option for builders, designers and developers who want to achieve a zero energy building. This recognition will go a long way toward making passive house mainstream.

    This took a lot of time and effort, and we owe thanks to Sam Rashkin, Chief Architect at the DOE, whose knowledge, vision and determination were critical to the effort. (Sam was the keynote at last year’s North American Passive House Conference.)

    So, how does this partnership change current PHIUS+ passive house certification and what do consultants need to know?

    In a nutshell: not much. A passive house already fulfills most of the Challenge Home requirements – certification essentially remains the same process with a few minor additions! Those additions are very good improvements, making the home even better. Indoor air quality requirements ask for low VOC materials and the water efficiency requirements establish a reasonable savings baseline, all good things.

    The Challenge Home requires rigorous third-party, on-site verification, which already is part of PHIUS+. PHIUS+ certified RESNET Raters already use an advanced passive house checklist created specifically for passive houses. (This testing protocol is actually more rigorous than the one the Challenge Home is using.)

    What Challenge Home brings to the table that PHIUS+ did not before is a more formalized exterior water management and flashing checklist. Having seen quite a few bad water management details during certification so far, we are happy to add a more formalized process to assure the long term durability of the house. QAQC is crucial to assure quality in execution, actual performance and peace of mind for the client we found.

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    • June

      22

      2012
    • 2382
    • 0

    Japanese ‘Light House’ | Optimising Natural Light Without the Heat

    With extensive benefits, natural lighting is a key focus for the modern interior designer. Natural lighting in green buildings is even more important, and the balancing act between natural light allowance and solar shading is a challenge for designers around the world.

    A clever piece of innovation from a Japanese architectural firm, however, demonstrates that extensive natural lighting does not have to mean thermal gain. Architectural firm Takeshi Hosaka architects have developed the ‘Daylight House’ in Yokohama

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Costs of Custom Homes

The first thing most people want to know is: What does it costs to build a 3000 sqft custom home in the Atlanta, GA. market?  The first thing you have to calculate is the square footage you want.  Once you have that, the numbers below give you a good starting point.

Adjusted Square Foot Calculation:

New Construction:

Renovations:

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