We took part to the “Train the trainer” class, organised by the Passivhaus Institut of Darmstadt on the days following the 2016 edition of the International Passive House Conference. The class is geared towards passive house experts, who intend to become teachers in the Certified Passive House Designer/Consultant class (CPHD/CPHC) and in the Certified Tradesperson class.
This week we are busy in Darmstadt, Germany: Enrico just presented at the 20th International Passive House Conference, and he's currently taking his class to become a certified trainer with the International Passivhaus Institut. Stay tuned for our articles on the Conference, and about our training programme in Italy and Colorado.
We continue our series of articles on thermal efficiency of windows, describing the glass edge thermal bridge. As far as thermal bridges go, this one is inevitable, and it represents the weakest point of a well designed thermal envelope. It needs to be analyzed carefully, in order to prevent condensation (or ice) to form on the edge of the glass, discomfort, and an overall drop in the performance of the window/door.
After covering thermal transmittance U and resistance R of opaque assemblies, and insulated glass, we now cover one of the most critical areas of the thermal envelope: window frames. Good windows are the cornerstone of a performing building for both comfort and energy efficiency, specially if it is a passive house.
Last week we went to Nuremberg, Germany, for the 2016 edition of FensterBau, one of the most important expos worldwide for window production. Target of the fair is the entire sector of windows and openings. The event is organized alongside the Holz-Handwerk expo, addressing wood carpentry in the broadest sense.
With a short investigation, we add our contribution to what has been recently published by some Italian consumers and professionals associations. Although the example described in this article is purely Italian (and deeply so), we believe that the same situation with thermal paints is happening in other countries too. Here we try and evaluate how solid this products are, and whether or not they can be helpful, with an example of a thermal bridge.
To achieve thermal comfort and energy efficiency in buildings, a primary role is played by the thermal envelope: this is required to thermally decouple the indoor environment from the ever-changing external conditions, both in summer and in winter. The structures of the thermal envelope need to be able to control the amount of heat migrating through them: the thermal resistance and the thermal transmittance are two ways to describe this phenomenon.