Passive Passion a short film about Germany’s Passivhaus Building Energy Efficiency Standard

A beautifully finished Passivhaus building in Dresden, Germany.  With all the PV on the roof, this is almost certainly a net positive energy building.
A beautifully finished Passivhaus building in Dresden, Germany. With all the PV and solar-thermal on the roof, this is almost certainly a net positive energy building.

Passive Passion is a good 20 minute long film introduction to the German Passivhaus energy efficiency standard, which reduces building energy use by 80-95% (depending on what existing code you compare it to).  It looks at the roots of the design standard in Germany, and gives a few examples from the tens of thousands of Passivhaus certified buildings in Europe, including single family homes, row houses, apartment buildings, public low income housing, and office buildings.  They talk about what makes the standard work: airtight building envelopes, super insulation, no thermal bridging, heat recovering ventilation.  The film also looks at a few builders and designers in the US trying to popularize the cost effective implementation of these methods. It’s clearly possible.  The examples are out there today.  We just have to decide to do it!  If we’re going to get to carbon zero, someday our buildings will all have to function something like this.

The film can be viewed online thanks to the enlightened self interest of Four Seven Five, a high performance building components supplier in New York.

Passive Passion

Passive Passion is a great 20 minute long documentary about the German Passive House energy efficiency standard.  It looks at the roots of the design standard in Germany, and gives a bunch of examples of implementations in Europe, from single family homes to row houses, apartment buildings, public housing, office buildings, etc.  Talks about what makes the standard work: airtight building envelopes, super insulation, no thermal bridging, heat recovering ventilation.  Also looks at a few builders and designers in the US trying to popularize these methods, and do it cost effectively.  Clearly it’s possible, we just have to decide to do it!

Empowerhouse: an affordable, net-zero Passivhaus in DC

The Empowerhouse is an affordable, net-zero Passivhaus design, that came out of the Solar Decathlon competition.  In collaboration with Habitat for Humanity, the team as built a duplex in the Washington DC area that is site net-zero, despite having the smallest solar array of any of the homes entered in the competition.  It was able to do this because it took a Passivhaus approach, aggressively minimizing all loads first, sealing the building nearly airtight, and super-insulating it.  They also integrated a rooftop garden and terrace.  By sharing the heat management equipment between the two relatively small units, they were able to reduce costs substantially.  All this means the low income residents will spend much, much less on energy over the lifetime of the building.  We need more affordable housing that looks like this.

When the River is Client

Design Explorations of the Lower Colorado River, a landscape architecture course taught by a friend of mine at Cal Poly, in which the Colorado River is taken to be the primary client, and human needs are assumed to be real, but secondary.  All we have left is gardening.  We might as well do a good job of it!

Google Street View for building energy efficiency

Essess is doing drive-by thermal imaging in high density urban areas across the US, hoping to target possible building energy efficiency opportunities.  Another company is using urban satellite imagery to choose the best rooftops for solar energy siting.  Big Brother may be watching you… but at least occasionally he’s got the right idea.

Location Efficiency and Housing Type

According to this EPA study, regardless of the type of housing, living in an area with good transit access saves more energy than building a “green home”. Of course, living in a mixed use, transit accessible apartment that’s also energy efficient uses the least energy, but it’s important to realize how limited the potential for cost-effective energy efficiency is in a sprawling suburban context.