Posts Tagged ‘Passive House’

Passive House Training

Friday, December 9th, 2011

Passive House Rater Training in Urbana, Illinois took place last week. The Green Gobbler partook.

Last weekend I spent a jam-packed couple of days in a room with 16 other highly skilled RESNET raters

Listen and Learn

at the inaugural Passive House rater training in Urbana, Illinois. The Passive House Institute US, or  PHIUS for short (kind of short) rater training was spent talking about advanced products, materials, applications;  and yes, with all of these rock-star RESNET folks, it was easy to geek out on a topic or two with all of these advanced people to discuss energy efficiency and other passive house concepts with.

What is PHIUS training all about anyways? It is like a want ad, isn’t it: “PHIUS is seeking qualified RESNET raters who want to learn how to give accurate and meaningful ratings of buildings designed and constructed to the Passive House standard. Working with experienced RESNET raters, PHIUS has developed a curriculum leading to qualification to rate projects seeking PHIUS+ Certification.” Taking the Passive House training in hand with the scope of the project, PHIUS raters are able to bring a project full circle.

In a word or three: Project. Team. Raters. So here it goes…follow me on this one…  PHIUS appoints a consultant, then the consultant works together with project team and submits their planning package to PHIUS for review, then after project has been reviewed (pre-certified), a rater is assigned, reviews package and then the project will have the great privilege to be assessed across 4 phases of construction (read: inspections).  These 4 inspections are: 1.  slab and foundation insulation and site shading, 2. site visit for air sealing details before insulation which includes a preliminary blower door test, 3. Insulation, duct work and domestic hot water inspections and 4. Final Inspection and Testing.  Interesting note, not just caulking and spray foam for air sealing, taping is shown to work best when applied correctly. Raters take all of the elements of the project that they see on site and communicate the qualifications back to the project team in its entirety to keep the Passive House on track.

Talk about a house that was kept on track! Here is an interesting case study: The 16 of us rater trainees heated a Passive House home we toured  almost 10 degrees just standing around being the RESNET folks that we were- not because we’re hot (or full of hot air, even), but because of the proper air sealing techniques and insulation that the Passive House standards have been set and achieved. In this case study home, we got to see something super-cool: CO detectors were attached to ERV to ramp up the fresh air when needed- this was interesting and I’d never seen this system in person before.  Our second field trip lead us to t0 a Solar Decathlon house that was a passive house. Side Note:  After the competition it appears that the students who had built the home had -sneakily- taken out original HVAC and had installed a “super-secret” and small CERV system that has everything -heating, cooling, ventilation, de-humidification, all in one box. It is estimated that the very small CERV system will take 3 days to get the home to a stasis, but then once you get it to the temperature that you want, it just stays- talk about super-efficient. It might not be instant gratification, but it is definitely energy efficient. These were just some of the nifty case study items we got to check out towards the end of our rater training.

To wrap it up, PHIUS just wants us to build highly sustainable, energy efficient homes that focus on these key elements of design: Building Envelope, Shading, Heating and Cooling, Ventilation, Lighting and Appliances, Hot Water, Renewable Systems – and I’m on board with that.  The faster we get there the better.

Passive Home in Bethesda, MD by Peabody Architects

Thursday, March 31st, 2011

Nearly 13 years after building their dream team, Peabody Architects has their aptly named The New American Foursquare Passive House well under way in Bethesda, MD.

With the strong drive and determination to put together a project that is Passive in design and the guidance of a great team including award winning HVAC contractors and Earthcraft Technical advisers,  Alexandria, Virginia based Peabody Architects is on their way to creating the DC Metro area’s first completely passively designed home. From the get-go this project has been done the right way, they put together a team with the dedication to the plan, to create a home which would embody tight construction, comfort, health and utilize building principles which encourage the home to be built as a system.

In a quote from their blog over a year ago, Peabody’s design team mention ” While the house won’t look different from a traditional home, you will clearly feel a difference from the moment you walk inside this house. Passive Houses are exceptionally quiet and comfortable. There is no stratification of air; there are no drafts, there is no feeling being hot or cold when standing next to a window. Consistently in European surveys (where over 20,000 Passive Houses have now been certified), it is the comfort of these houses most remarked upon by their owners.”  This truly defines how this home has been produced; it is a gorgeous space, that is set apart by its efficiency and conscientiousness, not by its outward appearance, which is what some people tend to think when they start to let their minds wander about green, energy efficient or passive homes if they aren’t familiar with the concept.

Passive homes are a German concept which is quickly catching on in the US- and rightly so with the change in our climate and the climbing energy costs; it even suits are needs here in the mid-Atlantic. The Passive House Institute US states that ” Passive Houses are affordable, comfortable homes that meet the most rigorous building energy standard in the world. Far more than a checklist of green building options, Passive House design is a state-of-the-art, systematic approach to super-efficient construction that reduces space heating and cooling loads by an amazing 90%…Passive House standard puts true carbon-neutrality within reach. Today. Ten thousand Passive Houses have already been built in Europe, but this approach to home building has only very recently gained traction here in the U.S. ”

From site location to the actual products used in the homes, Passively designed homes such as the Peabody Architects New American Foursquare out in Bethesda, MD which is comprised of SIPs panels, super high efficiency HVAC system, tight windows, short duct runs and compact plumbing systems need to keep their projects on target from the outset. Peabody’s team was able to do this by organizing their plan from the beginning and understanding this key component: inspection and a system of checks and balances. What is highly important is that throughout the build process- that the whole home is inspected and kept on track by someone like the Conway Construction team  who would be able to help identify any potential issues which could breach the thermal envelope of the home. Since this is a home which is to be built tight and ventilated right, as we like to say, it is imperative that an auditor such as this be able to work with the builder team throughout the process to guide them through the energy efficiency process. As a member of the team The Green Gobbler is the HERS rater -providing energy efficiency guidance, energy modeling and diagnostic testing during the pre-drywall and final portions of the project. We’re all excited to see this first Passively designed home in the DC Metro area and proud to have been a part of this great team put together by the Peabody Architects group.

As the Peabody team brings this project to a close, we will keep you posted on the progress. Keep tabs on this project through our blog and join the discussion on our Facebook page.