Entries by duncanadmin

Foam-Free Air Sealing for Energy-Efficient Buildings

Presentation of air sealing strategies for high-performance buildings without relying on spray foam or rigid foam insulation. +Ken Levenson presenting foam-free air sealing techniques for a NYC townhouse with interior insulation and a continuous “smart” vapor-retarding air barrier. This technique is important for Passive House retrofits and should be considered best practice for any gut rehab […]

Revit and PHPP: Getting BIM and Energy Modeling Software to Work Together

PHPP—the energy modeling software for the Passive House energy-efficiency standard—requires users to input wall areas calculated to the exterior of the thermal boundary. By default Revit does not calculate wall areas this way. Gregory Duncan Architect created a workaround to create a wall schedule that can export meaningful information to PHPP. UPDATE: Please see this […]

Revit Content Online

A great list of Revit family content from the LinkedIn Revit Users group: Parveen S. • Our team have been using all these website whenever required. I hope you’ll find this information useful. http://seek.autodesk.com/http://www.caddetails.com/ (requires registration) http://www.cadforum.cz/catalog_en/?fo=RFA (Requires registration) http://www.usgdesignstudio.com/default.asphttp://www.revitcity.com/index.phphttp://revitcomponents.blogspot.com/http://www.revitfamilyman.com/new3revitfotwpage.htmhttp://www.turbosquid.com/Revit (for a fee) http://www.augi.comhttp://www.arcat.com/bim/bim_objects.shtmlhttp://www.jeld-wen.com/http://www.kolbe-kolbe.com/http://www.strongtie.com/drawings/revit.asphttp://www.symbolmachine.com/http://revitfactory.com/http://www.formfonts.com/http://www.broutek.com/http://www.revit-content.com/http://www.revitstore.com/http://www.reedconstructiondata.com/bim/bim-object-creation/http://www.smartbim.com MEP objects(some of the links might be outdated): from AUGI: http://forums.augi.com/showthread.php?t=99663 […]

Maryland wins 2011 Solar Decathlon

The University of Maryland’s entry in the U.S. Department of Energy Solar Decathlon 2011 in Washington, D.C., Saturday, Sept. 30, 2011. (Credit: Stefano Paltera/U.S. Department of Energy Solar Decathlon) The University of Maryland won the 2011 Solar Decathlon, held at the National Mall in Washington, DC. The U.S. Department of Energy Solar Decathlon is an […]

Thermal Bridging

At Gregory Duncan Architect we use THERM 6.3 software—a 2-D building heat-transfer modeling tool developed by Lawrence Berkeley National Laboratory—to analyze thermal bridges. Thermal bridges are areas in a building envelope that have higher than normal heat loss. The color infrared analysis in THERM pictured above shows a thermal bridge at the footing of a […]


The Passive House low-energy building standard applies to non-residential as well as residential construction. Here’s a video in German about how to design a Passive House hospital: Energiekonzept eines Passivhaus-Krankenhauses.  Danke am Institut für Bauen und Nachhaltigkeit The basic principles of a well-insulated building envelope, properly oriented high-performance windows, and a ventilation system with heat recovery […]

More Media Coverage of PHI/PHIUS Split

Ecohome, a magazine of the American Institute of Architects (AIA), continued the media coverage of the decision by the international Passivhaus Institut to end its contractual relations with the Passive House Institute US. The magazine featured a quote from Gregory Duncan and a rendering of his proposed Passive House project in New Orleans. Gregory Duncan, […]