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Affordable, High-Performance House: Bates Avenue

Posted by Green Builder Staff

Aug 30, 2016 10:53:04 AM

This 1,104-square-foot home achieves a HERS score of 57.

As a landlord leasing affordable homes built in the 1970s and 1980s, Scott Willemsen of Sunroc Builders in Lakeland, Fla., watched his tenants pay hundreds of dollars each month on electric bills. He decided to take matters into his own hands, and build affordable, energy-efficient homes that were not available in his market. He used SIPs on the 1,104-square-foot home on Bates Avenue, which has a HERS score of 57.

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Making Zero Energy Homes a Mainstream Option

Posted by Christina B. Farnsworth

Feb 15, 2016 10:50:57 AM

Solar shingles and an attractive rebate program are making net-zero homes from Addison Homes appeal to buyers in this South Carolina market.

Addison Homes is committed to making zero energy a mainstream option, modeling a vision of sustainable construction that’s attractive, affordable and attainable for homeowners. Its 2,700­-square-­foot InVision Zero SC is not only the first zero­-energy home in Greenville, S.C., it is also the first area’s first Active House.

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Farmhouse Addition Meets Passive House Standards

Posted by Green Builder Staff

Feb 5, 2016 11:02:21 AM

This home, built onto an old farmhouse, meets the rigorous standards of Germany’s Passivhaus program.

LOCATED 30 MILES north of Prague, Czech Republic, this project is an energy-efficient 1,200-square-foot residence. The client requested a place to retreat: a private yet open space, full of light. The house was to be strikingly modern yet contextual. Built upon an abandoned single-story structure for housing pigs and chickens, it is an extension of an 18th-century farmhouse. In a dense rural context, the home re-interprets the traditional stone and timber house and translates it into modern form. Local artisans contracted to build the timber construction employed traditional techniques.


NAME: House for a Writer in Bohemia, 30 miles north of Prague, Czech Republic DEVELOPER: Channa Newman
BUILDER: Karel Zikmund, Zikmund Hriste
ARCHITECT/DESIGNER: Elan Neuman Fessler, Emergenative Architecture
INTERIOR DESIGNER: Elan Neuman Fessler, Emergenative Architecture
PHOTOS: Emergenative Architecture

The house has an airtight envelope with low heat loss (less than .15W/m2K), electrical on-demand hot water and triple glazing. The new construction achieves the challenging performance requirements of a German passive house, and it exceeds LEED Platinum standards. The existing sandstone and brick masonry was mostly preserved or reused. New materials were selected for their low carbon footprints and longevity; these include locally harvested timber, bamboo flooring and white aluminum roofing. High-efficiency building systems recycle and retain heat energy.

The House is oriented south and west for natural daylighting and cross-ventilation. In winter, solar energy warms the northern wall, which acts as a passive thermal mass. Radiant heating transfers heat passively to the other masonry walls, and the thermal equilibrium between floors is maintained with an HRV unit. New wall assemblies are “open” to both sides, have low permeability, are without thermal bridges and are insulated with hydrophobic insulation. Natural and forced air circulation on both sides prevent the settling of moisture within the assembly. This thoroughly modern home features efficient appliances from Bosch, Siemens and Miele, plumbing fixtures from Franke and Kludi and LED lighting from Philips.

Combining the old and the new was a cost-effective strategy for creating a cozy, healthy home. At $115 per square foot, it attains high standards at a low cost.

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Sustainable Strategies Abound in this Case Study House

Posted by Green Builder Staff

Feb 3, 2016 5:32:39 PM

A house in Bellingham, Washington, demonstrates innovative water and energy systems that meet the standards of the Living Building Challenge.

THE BIRCH CASE STUDY HOUSE was developed using the Living Building Challenge as a guide. The primary goal of this project was to implement numerous sustainable strategies, highlighting the successes and failures when designing, permitting and constructing Living Buildings.

To help realize the project, [bundle] design studio partnered with non-profits and building product manufacturers. Throughout construction, [bundle] hosted a workshop series with Sustainable Connections to present green materials and strategies to the local building community. [bundle] also partnered with Northwest Energy Efficiency Alliance (NEEA) for the NextStep Homes program and with WSU to field test a CO2 heat pump that is used for domestic hot water and radiant floor heating.


NAME: Birch Case Study House, Bellingham, WA
BUILDER: Chris Tretwold, Tretwold Construction, LLC
ARCHITECT/DESIGNER: Dan Welch, [bundle] design studio
PHOTOS: [bundle] design studio

The Birch Case Study house has proved successful at demonstrating a number of pathways towards Living Buildings. Among the highlights, it is the first within the Bellingham city limits to choose not to hook up city water and sewer. Instead, the project achieves net-zero water usage through the use of onsite rainwater catchment, composting toilets and graywater reuse.

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Passive Townhomes Cluster on Infill Site

Posted by Christina B. Farnsworth

Apr 2, 2015 10:51:00 AM

View Haus 5 achieves Passive House standards with air-tight, super-insulated building envelopes and high-performance south-facing windows.

Sunny Side: Kitchen with its south-facing windows.

“IT'S ABOUT BUILDING HOMES that I would live in with my own family,” says Sloan Ritchie of Cascade Built. He does live in his first passive home, the award-winning Park Passive.

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