Time constant a building

What’s the “time constant” of a building?

Among the many parameters than play a role in the thermal behavior of a building, whether or not it is built to be a Passive House, the time constant is one of the least known ones. Nontheless, this parameter influences the way a building responses to changes in internal and external conditions, and therefore it is has a very important role in the correct operation of the building and its heating/cooling system.

The potential benefit of an early ‘Blower Door Test’.

In December we ran a 'Type B' Blower Door Test on our CasaClima Class A project, "Conte Re", under construction near Albinea (in the province of Reggio Emilia, Italy). Many of our colleagues wondered why we decided to run the test so early in the construction process. Here is a brief overview of the benefits...

Archicad 17

BIM Energy Analysis with Archicad 17

As in its previous version, Archicad 17 comes with a built-in energy evaluation tool, that allows designers to develop the building energy concept from the preliminary design phase. The line that divides architectural design and energy simulation seems to be getting thinner and thinner. On one hand, this Graphisoft approach is no doubt cutting edge. However, some large doubts remain:

Mold and condensation problems

Mold and condensation on the interior surfaces of a house's thermal envelope is a self-evident proof of poor quality and lack of comfort. It can happen on walls, roof, slabs and so on. These phenomena are symptoms of degrading building quality, and have immediate direct consequences on indoor air quality, health of the occupants and the overall comfort inside the house.

Energy effiency retrofit: external insulation or new doors and windows?

The future of the construction industry in Italy is in the energy efficiency improvement of our existing building stock. We are often asked whether you should invest in external insulation or in new windows for the highest return of investment, as far as comfort and energy savings. The short answer is neither or both. Allow us to explain...