Evital effective efficient windows at the Passivhaus International Congress

Batirama.Com 11/03/20180

Efficient windows are necessary to reach the Passivhaus standard.We only talk about them at the Passivhaus Congress in Munich.

In the Passivhaus approach, windows have been one of the key components from the outset.This is widely evident on the second day of the 22nd Passivhaus international congress in Munich.Not only the Passivhaus Institut de Darmstadt very early for triple glazing and started to certify windows, but each congress hears its share of technical presentations on the developments in thermal performance of windows and several window manufacturers regularly exhibit in the associated living roomat the Congress.

The Rockframe mixed window associates sleeping and opening wood with an outdoor protection in rock wool to improve thermal performance.The manufacturer provides these profiles in all RAL shades and advances a lifespan of 50 years.© Rockwool

223 certified windows

Today, the Passivhaus Institut de Darmstadt has certified 223 different models of windows, whose profiles are made of wood, aluminum, PVC, mixed wood/aluminum or PVC/alu.Among the certified products, there are also more exotic profiles, such as steel/aluminum from Janisol Hi Festverglasung windows of Jansen AG (Uw = 0.80 W/(m².K) with a glazing UG = 0.7 W/(m².K)).This window uses dormants in steel profiles injected with resolute foam to improve their thermal performance.Its opening are in 51 mm triple glazing (5/18/5/18) with Swisspacer Ultimate spacers from the Saint-Gobain group.

There is also an example of a mixed wood / rock wool profile with the Rockwoolian Rockwoolian Rockframe window (Deutsche Rockwool Mineralwolle).Rockframe is a triple glazing wood window, always with the Swisspacer Ultimate spacers, wearing rock wool profiles outside on the opening and on the dormant (Uw = 0.85 W/(m².K).

Chinese Harbin Sayyas Windows Stock Co.Has certified by the Passivhaus Institut, the Sayyas Passivaplus window.Very efficient (Uw = 0.60 W/(m².K) with a UG glazing = 0.52 W/(m².K)), it combines interior wood profiles with external GRP profiles (Glass Reinforced Plastic), a polyester reinforced with glass fibers.

This is one of only two examples of glass fibers and synthetic materials.The other is the Delta Plus Cold Climate window from the German manufacturer DPHT (Deutsche Passivhaus Transfer).Also in wood / GRD, it achieves a still a little better performance: UW = 0.59 W / (m².K) with a UG glazing = 0.59 W/(m².K).The small improvement compared to the Chinese window is probably due to the fact that it contains the famous Swisspacer Ultimate spacers between the windows of its triple glazing.

To improve the performance of their windows, the manufacturers have gone double, then to triple glazing filled with argon or kryption.Then they attacked the thermal bridges between windows thanks to particularly little heat conductors, such as swisspaceultimate.© Swisspace

Up to Uw = 0.58 W/(m².K) in quadruple glazing

When examining the performance of the windows certified by the Passivhaus Institut, the UW values go from 1.20 to 0.58.The windows are certified for four different climates: cold, mainly cold, mostly hot and frankly hot.The Australian Logikwin 85 window Logikhaus Pty, with its UW = 1.62 W/(m².K) is precisely certified for hot climates: South, North and South Africa of Australia, southern China, Central America and South America, Mediterranean, etc..Mixed wood / aluminum window, it only carries double glazing (UG = 1.20 W / (m².K)).At the other end of the classification, only one window, for the moment, is certified with UW = 0.58 W/(m².K).

This is the RUKNA-1 model of the Russian manufacturer Zao "Bitri".Certified for cold climate, it reaches UW = 0.58 W/(m².K) with a glazing UG = 0.47 W/(m².K) and uses mixed wood / aluminum profiles.The interval between wood and aluminum is filled with compactfoam CF 150 foam, provided by the Viennese company Compactfoam, created in 2005.

The window carries a quadruple glazing 87.3 mm thick, made up of an interior triple glazing (4/22/4/20/4), closed by the last outer compartment of 33.3 mm, including 4 mm of window.The triple glazing segment uses Super Spacer Triseal / T-Spacer Premium spacers, supplied by Quaxex Building Products.

In addition to conventional windows, the Passivhaus Institute has also certified eight sliding windows and two models of wood / aluminum roof windows with very low UW values: 0.7 for the FTT U8 Thermo 2012 window from FAKRO and an extraordinary UW =0.55 for the GGU-K—008230 velux window.

The most efficient windows, designed for cold, even arctic climates, grow to the quadruple glazing, like the RUKNA-1 window of the Russian manufacturer Zao "Bitri" or the FTT U8 Thermo 2012 from FAKRO.© Passivhaus Institut, Fakro

The Velux Ggu-K—008230 Velux roof window uses 4 windows, two of which are attached for total acoustic weakening and reached UW = 0.55.© Velux

Several communications on windows

Participants in the 22nd Passivhaus congress could hear a whole series of communications on windows and facades.Two were particularly significant.The first, presented by the architect Gerrit Horn of Kaiserslautern in Germany, focused on the real cost of components and works for a passive building.

He estimates that the cost of passive windows varies, depending on the model, from 50 to 100 €/m² of window, sleeping included.This results in a total cost of 1500 to 3000 €, for the windows of a single house with a glass surface of 25 to 30 m².Which is a way of explaining, after all, that this amount reported at the price of the house, is relatively modest.

The second communication undertakes to prove that, unlike the proverb, the shoemakers are not necessarily the most ill.In November 2012, Chinese industrialist Harbin Sayyas Windows Stock Co., of which we were talking above and which is the largest Chinese manufacturer of wooden windows, asked two German specialists in the Passivhaus Standard to design a new factory in which it will make its new passive windows and whose buildings would themselves be passive.

Ludwig Rongen and Reiner Wirtz, from the architectural firm Roa Rongen Architekten therefore launched in the design of a production hall of 15,550 m², of a non-heal storage area of 12,781 m², of an office building4,950 m² and a reception location of 100 m² for a total construction cost of 16.5 million euros. Le challenge venait du fait que la température extérieure peut descendre à -40°C à Harbin en hiver, tandis que l’été connaît des périodes d’intense chaleur (>35°C) plutôt sèches.

Chinese industrialist Harbin Sayyas Windows Stock Co.Built a passive factory to make its passive certified wood windows.China is taking great importance in the world of passive.The 23rd Passivhaus International Congress in 2019 will take place both in Heidelberg in May and Gaobeidian in northern China in September.© Harbin Sayyas Windows Stock Co

How to make a "passive" factory

To be passive, remember, a building must meet 3 criteria: annual heating consumption ≤ 15 kWhep/m², Annual consumption all uses ≤ 120 kWhep/m² and air seal ≤ 0.60 h-.In the office part, maintaining a comfort temperature of 20 ° C in winter and 25 ° C in summer with internal heat intakes of 3.8 W/m², the designers have built a building whose heating consumption reaches14.62 kWhep/m² and total consumption culminate at 119.85 kWhep/m², with excellent air seal of 0.16 H-1-1.

In the production hall, the reached values are 0.20 H-1 for air tightness-which is very low in an industrial hall-13.83 kWhep/m² of annual heating consumption and 108 kwhep/m²total energy consumption in the year.

With possible external temperatures of -40 ° C in winter, double flow ventilation posed a particular difficulty.Without specific precautions, it is certain that the exchangers and the air outlet loaded with humidity would be frosted and clogged, preventing any functioning of the ventilation below -25 ° C.In winter, the new air is therefore preheated before reaching the outdoor air inlet of the double flow groups and the air rejection mouths outside are heated to avoid condensation and frost.

The factory has been in operation since fall 2016.The first winter went perfectly: the temperature has never dropped below 18 ° C in the production hall.During the summer of 2017, however, the heat released by the machines installed in the hall, more important than expected, led to uncomfortable overheating.The designers are modifying the installation - providing night refreshment and additional natural ventilation by opening the roof smoke extraction orifices during the summer - to remedy it.

The Smartwin network, formed of SMEs in several European countries, manufactures mixed passive windows in wood / aluminum.© Smartwin

Smartwin, a European network of passive wood windows

Several window manufacturers exhibited at the 22nd Passsivhaus Congress, including the two European Smartwin and Optiwin networks.Both similar and competitors, these networks were born from the gathering of European SMEs around the idea of wooden windows with very high thermal performance.Smartwin was created by the German engineer Frantz Freundorfer who heads the German company Pro Passivhausfenster GmbH.

He initially gathered three companies, including French Menuiserie André, installed in Drôme, and now federates a dozen companies, including one in China, one in the United States and a third in South Korea.The Smartwin range of wood / aluminum windows (indoor pin, outdoor aluminum) contains typing models and sliding, whose profiles are the finest possible to maximize the daylight.

These are passive windows, triple glazing, certified by the Passivhaus Institute in Darmstadt, class.The initial smartwin model is Passive certified UW = 0.76 W/(m².K) with a glazing UG = 0.70 W/(m².K).Second generation, the Smartwin Compact window minimizes the masses seen thanks to an refinement of the sleeping frame and allows, with equal dimensions, a larger glass surface: 70 mm of mass view on the sides and the top, 86 mm in the lower part dormant +opening.It reaches uw = 0.77 W/(m².K) with a glazing UG = 0.70 W/(m².K).

While the Smartwin Arctic model, designed for very cold climates, reaches UW = 0.60 W/(m².K) with a UG glazing = 0.52 W/(m².K).The Smartwin group was also the first to certify a passive mixed wood /aluminum sliding window: Smarwin Slringing reaches UW = 0.80 W /(m².K) with a glazing UG = 0.70 W/(m².K) and up to Uw = 0.68 W/(m².K) with a UG glazing = 0.54 W/(m².K).

Smartwin and its founder Frantz Freundorfer showed their latest invention at the 22nd Passivhaus Congress: double-flow ventilation installed in the thickness of a wall.The air inlet takes place under the window of the window.The switch slides to give access to the filter and change it.This double flow ventilation is associated with the solutions of the coat wall for the Smartshell renovation: all the distribution and the recovery of air are walking outside between the original wall and the new coat wall insulating.© PP

In France, Smartwin is manufactured and distributed by Menuiserie André.As Jacques André, son of the founder, explains, who should take over the company this year, 70% of window areas manufactured by the company are Passivhaus certified.© PP

From the Gros-Oeuvre window to

Optiwin, the second European network of passive wood windows, was created by Joseph Fresinger, Fresinger Fensterbau manager.In France, Optiwin is represented by Bieber carpentry in Waldhambach (67) and by Tillieux carpentry in Tourcoing (59).Optiwin notably had PASIVHAUS certify the ranges of LIGNUMA strike windows (UW = 0.79 W/(m².K) with a glazing UG = 0.70 W/(m².K)), alphawin (uw = 0.78 W/(m².K) with a glazing UG = 0.70 W/(m².K)), alu2holz (mixed wood / alu, uw = 0.78 W / (m².K) with a glazing UG = 0.64 W/(m².K))

Let us also mention Futura and Purista (glass glued to the outside, mixed wood / aluminum, Uw = 0.79 W / (m².K) with a glazing UG = 0.70 W/(m².K)), as well as the wood / alu resista and zwoa2holz stripping ranges, the lean-sliding Optiwin Motura with glued exterior glass ((Uw = 0.80 W / (m².K) with a glazing UG = 0.70 W/(m².K)) and, finally, the door entered (ud = 0.68 W/(m².K)).

For its part, the Smartwin network has also had four wholesale solutions certify, with a wooden frame: Smartshell Timberframe G, Smartshell Timberframe E, Smartshell Solid S, Smartshell Solid Timber.For a professional in the construction of individual houses, use these solutions certified by the Passivhaus Institut, facilitates the obtaining of the Passivhaus Standard for the.The treatment of thermal bridges is guaranteed, the nature and the thickness of the insulators correspond to the necessary values, etc..

The Smartwin and Optiwin networks will be at the Nuremberg Front Fensterbau Show, from March 21 to 24.Significantly at the same dates, Batirama will be at the Light+Building Salon (March 18 to 23) in Frankfurt.

Source: Batirama.Com / Pascal Poggi