Light through clouds

The Window as a “Solar Panel”: Light Transmittance & Solar Factor G

With this article, we cover two very important aspects of glazings: light transmission and the solar heat gain coefficient. These parameters are extremely important for performing buildings and passive houses, however they are often overlooked by both designers and window manufacturers.

PSIg value glass edge thermal bridge

The glass edge thermal bridge: the PSIg value

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.

Energy efficiency of windows: the Uf value

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.

Broken glass

Thermal transmittance of glass: the Ug value

Insulated glass units, IGU for short, have been around for a long time. These elements are of primary importance for the energy balance of highly performing buildings and passive houses: that is why we dedicate this article to the thermal transmittance of insulated glass.

Insulation materials: discovering the lambda value

The lambda value of a material indicates its ability to transfer heat: this property is therefore very important in the design of highly performing buildings and passive houses. The information commonly available is unfortunately quite confusing: with this article, we'll try and shed some light on the topic.

Passive House Window Talks 2016

A couple of weeks ago, we took part to the 2016 edition of the Passive House Window Talks. This year, the location was Riga, Latvia. The focus of the event is the importance of windows for comfort and energy efficiency of highly performing buidlings such as passive houses.

What’s an insulation material?

With more and more people talking about building energy efficiency and passive houses, it has become more and more common to hear about insulation. In this article, we explain what an insulation material is, to try and shed some light…

Andrew Michler’s Passive House

During Enrico’s recent visit to Colorado, we finally had the chance to visit Andrew Michler’s passive house. At about 2.000 m (6.400 ft), in the mountains near Fort Collins, Colorado, this building is capable of remaining comfortable even in case of a power outage, with an interior temperature of about 18°C (64°F) with no heating.

Certified construction system for Passive Houses

The construction system certification is possibly the least known certification offered by the Passivhaus Institut, and yet it can help spreading passive buildings all over the world. We worked on the first system certification for passive houses in a warm climate: we try and explain what it's all about.

Colorado: our work ties become permanent

With Mariana currently involved full time with Natural Capitalism Solutions and AE Building Systems, our professional ties with Colorado are now solid. This allows us to have experience in highly efficient buildings on both sides of the Atlantic, with some initial interesting considerations.

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