Case Studies
How Many Blower Door Fans Does It Take to Test a 26 Story Tower?
Passive House Certification of The House at Cornell Tech Blower door test being completed on June 3, 2017 Ten? Nine? Eight? Seven? Six? Five? Four? Three? Two? If it's the...
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Installer Spotlight: American Installations
Innovation in insulation installation... try saying that five times fast. American Installations rolling up to the job site. Ventilated Rotary Nozzle on the cellulose blower. Cardboard strips used as clamping...
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Airtight Wright: Using INTELLO to Restore an Architectural Relic
Lynette Widder. Usonia Historical District, Pleasantville, NY IKaneji Domoto’s Lurie House before being air sealed with Intello. Look at all the firewood they needed to keep that leaky assembly warm!...
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Hooray for Double Standards: Passive House + LEED Platinum in Quebec
A view of the beautiful Springhouse, which is both Passive House and LEED Platinum certified. Photo credit: Construction Rocket Inc. Framing begins on the main structure. Photo credit: Construction Rocket...
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A Builders Perspective on INTELLO
475 is excited to present this guest blog post by Brad Hankins, a designer-builder from Langley, WA. Long committed to sustainability, Brad knows the environmental benefits of high-performance construction. But...
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Vented High Performance Standing Seam Metal Roof
SOLITEX UM Project Spotlight in Waltham MA SOLITEX UM is the solutionfor standing seam metal roofs SOLITEX UM from Pro Clima is a 4-layer, vapor open and waterproof membrane...
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Project Spotlight – Prefab walls for a comfortable, cozy, and quiet Passive House in eastern British Columbia
Craig Toohey finds prefab walls for a comfortable, cozy, and quiet Passive House in eastern British Columbia Erik Olofsson of Erik Olofsson Construction has a vision of elegant and affordable...
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Cambridge MA - Small Urban 2-Story Gets a High Performance Upgrade
Here's a sweet example of a successful Deep Energy Retrofit (DER) with airtight, foam-free walls and high performance ductless ventilation. The designer and GC is Jeff Geisinger, a Boston-based architect...
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Waterbury VT Municipal Complex uses INTELLO Plus for Foam-Free Enclosure Moisture Control
Waterbury VT Municipal Complex uses INTELLO Plus for Foam-Free Enclosure Moisture Control INTELLO Plus from foundation to roof: all interior walls and ceilings of this building include Pro Clima's airtight...
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I-Joist Simply Done in Greenfield, MA
If you haven't heard of Robert Swinburne Architect or Bluetime Collaborative yet, do yourself a favor and check out his website and blog. If you have followed his career, you...
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Tales From An Intello-gent Tiny House: 10 In-Depth Answers From An Enlightened Customer
10 In-Depth Answers From An Enlightened Customer 475 is excited to present this guest article, our most extensive customer-driven blog post to date. We're featuring the makers of the Room...
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VIDEO: How To Hit 0.23 ACH50 In A Historic Masonry Retrofit
Behind The Scenes of a Super-Tight Retrofit Project in Fort Greene, Brooklyn Before we set up the blower door, before we check for gaps in the air barrier, and even...
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Office Reno: Caliper Studio in Brooklyn, NY
Passive Office, Brooklyn, NY by Caliper Studio Make way for the new Caliper Studio passive office! Located on the North side of Brooklyn, an area that is rapidly transforming from...
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Builder Spotlight: Maria Klemperer-Johnson of the Hammerstone School and Hammerstone Builders
The builders, architects, and building owners we work with never cease to impress us. Our customers bring a level of experience and deep commitment to high performance construction that is...
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Unvented Foam-Free Roof Retrofit With Dolphin Insulation
There's a growing demand for high performance roof retrofits. For many homes it can be most practical and economical to improve the airtightness and insulation from the interior. Often the...
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Hanover, NH: Dartmouth College Dormitory Retrofit
Countless historic masonry buildings dot the American landscape, a large number of them falling under some form of aesthetic scrutiny prohibiting exterior insulation. The only option to make these buildings...
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Middlesex VT: Foam-free, WUFI-verified, and OSB-free high performance
Project Spotlight The town of Middlesex, Vermont, located just north of Montpelier, has put itself on the high performance building map. Leading the way is the new "Whitchurch Passive House...
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Ashfield MA: Deep Energy Retrofit (DER) by Quigley Builders
Quigley Builders recently completed a Deep Energy Retrofit (DER) project in Ashfield, MA, known as one of the Hilltowns of Western Massachusetts. I stopped by on several occasions to meet...
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Marlboro, VT: High Performance House with Vapor-Open Walls and Roof
A low-energy project by Michael Einermann, working with Kent Webster of Webster Construction, in Marlboro, VT, elegantly illustrates the simplicity of high-performance construction with vapor open walls and roof. A...
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Tight Historic Masonry Rowhouse Renovation by Caliper Studio
Tight Historic Masonry Rowhouse Renovation by Caliper Studio On Prospect Avenue in Brooklyn, NY, Caliper Studio's gut renovation of a brick brownstone rowhouse used what has become the typical Passive...
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