Passive Progressive

written by:
photos by:
August 18, 2012
Originally published in Open House

Among the first Passive Houses in France, this bamboo-clad farmhouse by the Parisian firm Karawitz Architecture brings a bit of green to tiny Bessancourt.

Read Full Article
  • 
    Courtesy of © 2012 Nicholas Calcott.
    Courtesy of © 2012 Nicholas Calcott.
  • 
  Sun Volt
With the roof angled at 43 degrees, the architects lined the southern slant of the house with solar panels to collect as many rays as possible. Karanesheva and Witzmann started with four, but then added 23 more, all by Systaïc; the company gave them a deal since theirs was its first installation in France. The panels now collect far more energy than the home actually needs, a precious resource that the pair sells back to the power company.
systaic.com  Courtesy of © 2012 Nicholas Calcott.
    Sun Volt With the roof angled at 43 degrees, the architects lined the southern slant of the house with solar panels to collect as many rays as possible. Karanesheva and Witzmann started with four, but then added 23 more, all by Systaïc; the company gave them a deal since theirs was its first installation in France. The panels now collect far more energy than the home actually needs, a precious resource that the pair sells back to the power company. systaic.com Courtesy of © 2012 Nicholas Calcott.
  • 
  Dividing Line
The home’s central “spine,” which 
Witzmann describes as “the back-
bone of the house at a load-bearing 
and technical level,” serves as the 
structure’s organizing principle. It 
groups the ventilation system and the 
majority of the electrical networks 
together and centralizes much of the 
home’s storage. By siting the living 
spaces on the south of the house 
so that they take advantage of the 
natural light, and placing the sanitary 
and service rooms on the north, the 
architects make the most of a smart 
passive solar layout.  Courtesy of © 2012 Nicholas Calcott.
    Dividing Line The home’s central “spine,” which Witzmann describes as “the back- bone of the house at a load-bearing and technical level,” serves as the structure’s organizing principle. It groups the ventilation system and the majority of the electrical networks together and centralizes much of the home’s storage. By siting the living spaces on the south of the house so that they take advantage of the natural light, and placing the sanitary and service rooms on the north, the architects make the most of a smart passive solar layout. Courtesy of © 2012 Nicholas Calcott.
  • 
  Silvered Screen
Stunning bamboo covers the house on all four sides, its lattice making up a striking set of adjustable screens that allow the residents to modify the facade to suit the weather. Karanesheva and Witzmann tested a host of materials, but bamboo had the aesthetic and green cred they were after.  Courtesy of © 2012 Nicholas Calcott.
    Silvered Screen Stunning bamboo covers the house on all four sides, its lattice making up a striking set of adjustable screens that allow the residents to modify the facade to suit the weather. Karanesheva and Witzmann tested a host of materials, but bamboo had the aesthetic and green cred they were after. Courtesy of © 2012 Nicholas Calcott.
  • 
  All told, they hung some 28,000 linear feet of the material with the larger sections composed of around 250 stalks. Each pole is threaded with 
galvanized steel wire and separated from the next by a small aluminum spacer. A highly renewable resource, the untreated bamboo has aged over 
time; what started as yellow-green has turned into a muted gray just a year after completion.  Courtesy of © 2012 Nicholas Calcott.
    All told, they hung some 28,000 linear feet of the material with the larger sections composed of around 250 stalks. Each pole is threaded with galvanized steel wire and separated from the next by a small aluminum spacer. A highly renewable resource, the untreated bamboo has aged over time; what started as yellow-green has turned into a muted gray just a year after completion. Courtesy of © 2012 Nicholas Calcott.
  • 
  Triple Plays
One key to the home’s efficiency is a tight building envelope that keeps the heat inside. Triple-paned windows by Optiwin (check out the three reflections of the flame below) and well-sealed frames do the trick. 
optiwin.com  Courtesy of © 2012 Nicholas Calcott.
    Triple Plays One key to the home’s efficiency is a tight building envelope that keeps the heat inside. Triple-paned windows by Optiwin (check out the three reflections of the flame below) and well-sealed frames do the trick. optiwin.com Courtesy of © 2012 Nicholas Calcott.
  • 
  Showing Off
In a nod to what they describe as “constructive truth,” the couple made the decision not to hide the technical elements that contribute to the home’s green attributes. And by displaying all the sustainable features in the walls, it’s “easier for our clients to understand the system when they visit the house,” says Witzmann. They incorporated the Genvex ventilation system’s double-flow ducts into the home’s interior, exposing them at various points as they run through the house. In addition to looking pretty, they distribute clement fresh air; temperatures hover around 
66 degrees Fahrenheit in the winter 
and 71 degrees in the summer, never going higher than 78. And yes, Karanesheva assures, “you can open the windows of a Passive House.” 
genvex.co.uk  Courtesy of © 2012 Nicholas Calcott.
    Showing Off In a nod to what they describe as “constructive truth,” the couple made the decision not to hide the technical elements that contribute to the home’s green attributes. And by displaying all the sustainable features in the walls, it’s “easier for our clients to understand the system when they visit the house,” says Witzmann. They incorporated the Genvex ventilation system’s double-flow ducts into the home’s interior, exposing them at various points as they run through the house. In addition to looking pretty, they distribute clement fresh air; temperatures hover around 66 degrees Fahrenheit in the winter and 71 degrees in the summer, never going higher than 78. And yes, Karanesheva assures, “you can open the windows of a Passive House.” genvex.co.uk Courtesy of © 2012 Nicholas Calcott.
  • 
  Light Line
The pair selected fluorescents in 
the kitchen and dining area for their 
energy efficiency, low cost, and 
clean aesthetic, echoing the bamboo 
screens outside. The Spina pendant 
above the table is from Ribag Licht 
and complies with very green Swiss 
Minergie standards. 
ribag.ch  Courtesy of © 2012 Nicholas Calcott.
    Light Line The pair selected fluorescents in the kitchen and dining area for their energy efficiency, low cost, and clean aesthetic, echoing the bamboo screens outside. The Spina pendant above the table is from Ribag Licht and complies with very green Swiss Minergie standards. ribag.ch Courtesy of © 2012 Nicholas Calcott.
Previous Next
Slideshow loading...
@current / @total
Read Full Article

You May Also Like

Join the Discussion

Loading comments...