LowEx Building Design PDF

Underfloor heating has a long history back into the Neoglacial and Neolithic periods. Evidence of „baked floors“ are found foreshadowing early forms of kang and dikang „heated floor“ later ondol meaning „warm lowEx Building Design PDF“ in Manchuria and Korea respectively. Korean fire hearth, was used both as kitchen range and heating stove. Asia continues to use conditioned surfaces but the application is lost in Europe where it is replaced by the open fire or rudimentary forms of the modern fireplace.


Författare: Hansjürg Leibundgut.
Die Reaktion auf den Klimawandel gilt als die schwierigste Herausforderung für die heutige Gesellschaft. Für einen grossen Teil des Energieverbrauchs wie auch des CO2-Ausstosses sind Immobilien verantwortlich, also der Betrieb und die Errichtung sämtlicher Gebäude.
Zero Emisson der Gebäude als Ziel, Low Ex als Konzept, der thermische Schwingkreis als theoretische Analogie, neue Instrumente für die rasche Berechnung und Darstellung der komplexen Systeme, neue kleine, dezentralisierte Gebäudetechnikkomponenten mit neuen Steuerungssystemen und eine neue Art der Finanzierung der nicht amortisierbaren Mehrkosten. Mit diesen Elementen ist es möglich, bestehende Gebäude in ihrem städtebaulichen, architektonischen und energetischen Kontext so zu transformieren und zu verändern, dass das Ziel der Emissionsfreiheit mit kleinen Mehrkosten und ohne Verlust an kulturellem Wert erreicht werden kann.
Nach der Einführung in den neuen Lösungsansatz wird die Umsetzung anhand von zwei realisierten Projektbeispielen, einem Neubau und einem Umbau, sowie von zwei Beispielen in Planung aufgezeigt.
– anwendbar auf alle Gebäudetypen
– in zwei Sprachversionen (dt./engl.)
"Es geht nicht darum, Energie zu sparen. Unser Anspruch zielt höher. Das unbescheidene Ziel muss die Emissionsfreiheit bei den Gebäuden sein und dies bei zugleich hochwertiger Architektur. Das schliesst sich keineswegs aus. Unser Ziel ist mit dem heute etablierten Stand der Gebäudetechnik umsetzbar und entspricht auch dem ökologischen Postulat der Zeit."
(Hansjürg Leibundgut)

Anecdotal literary reference to radiant cooling system in the Middle East using snow packed wall cavities. More sophisticated and developed gudeul was found in some palaces and living quarters of upper-class people in Korea. Ondol continues to evolve in Asia. The most advanced true ondol system was established. The fire furnace was moved outside and the room was entirely floored with ondol in Korea. Europe uses various forms of the fireplace with the evolution of drafting combustion products with chimneys.

Hypocaust type systems used to heat monasteries in Poland and teutonic Malbork Castle. Hypocaust type systems used to heat Turkish Baths of the Ottoman Empire. China and Korea continue to apply floor heating with wide scale adoption. In France, heated flues in floors and walls are used in greenhouses. Benjamin Franklin studies the French and Asian cultures and makes note of their respective heating system leading to the development of the Franklin stove. Steam based radiant pipes are used in France.

Ondol type system used at Civil War hospital sites in America. Reichstag building in Germany uses the thermal mass of the building for cooling and heating. The earliest beginnings of polyethylene-based pipes occur when German scientist, Hans von Pechmann, discovered a waxy residue at the bottom of a test tube, colleagues Eugen Bamberger and Friedrich Tschirner called it polymethylene but it was discarded as having no commercial use at the time. Liverpool Cathedral in England is heated with system based on the hypocaust principles. Frank Lloyd Wright makes his first trip to Japan, later incorporates various early forms of radiant heating in his projects.

28477 for panel warming using small pipes. Patents later sold to the Crittal Company who appointed representatives across Europe. Byers of America promotes radiant heating using small bore water pipes. Asia continues to use traditional ondol and kang—wood is used as the fuel, combustion gases sent under floor. Oscar Faber in England uses water pipes used to radiant heat and cool several large buildings. Frank Lloyd Wright designs the radiant heated Herbert Jacobs house, the first Usonian home.

First small scale polyethylene plant built in America. American developer William Levitt builds large scale developments for returning GI’s. Poor building envelopes on all continents require excessive surface temperatures leading in some cases to health problems. Korean War wipes out wood supplies for ondol, population forced to use coal. Developer Joseph Eichler in California begins the construction of thousands of radiant heated homes. Bjorksten of Bjorksten Research Laboratories in Madison, WI, announces first results of what is believed to be the first instance of testing three types of plastic tubing for radiant floor heating in America. Polyethylene, vinyl chloride copolymer, and vinylidene chloride were tested over three winters.

The first Canadian polyethylene plant is built near Edmonton, Alberta. NRC researcher from Canada installs underfloor heating in his home and later remarks, „Decades later it would be identified as a passive solar house. It incorporated innovative features such as the radiant heating system supplied with hot water from an automatically stoked anthracite furnace. 1967 sells license options to a number of pipe producers. Evolution of Korean architecture leads to multistory housings, flue gases from coal based ondol results in many deaths leading to the removal of the home based flue gas system to a central water based heating plants.

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