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Striking Off-Grid House on the Osa Penninsula in Costa Rica
Posted By Bridgette Meinhold On August 9, 2010 @ 6:17 pm In Architecture,Sustainable Building | 2 Comments
When SPG Architects took the job they set to work transforming an abandoned construction site into an elegant steel-framed concrete slab structure, which they used to create the masterpiece that is Casa Torcida. With 18,000 square feett of indoor and outdoor living space, this large home  certainly couldn’t be considered to have a small footprint — but the size of the home is tempered by the project’s many green building strategies . Most notably, the home is totally net-zero and features a large pv system on the roof  that supplies the majority of its year-round power needs. During the rainy season a micro-hydropower system in a nearby stream supplements the power.
The home is five stories tall and includes an infinity pool, views of the ocean and the Golfo Dulce starting on level two, and it has a yoga deck on the roof alongside the PV system. Located on a 100-acre piece of property on the Osa Peninsula in Costa Rica, the home is surrounded with rain-forest that is teeming with wildlife.
A 75,000-gallon rainwater collection  system provides for all of the home’s potable and non-potable water needs. Water is collected on the roof, which is coated in a non-toxic epoxy ceramic that helps keep the home cool under the hot tropical sun. All of the domestic hot water is provided from a solar hot water heating system located alongside the photovoltaics on the roof.
The home was built according to solar passive design principles , which minimize solar heat gain on the house and maximize natural ventilation. The efficient solar shading and ventilation systems have completely eliminated the need for air conditioning despite the tropical heat. The home’s materials consist of concrete, steel, man-made quarts and local wood found on the property. Appliances were selected based on their energy efficiency, which further minimizes the home’s energy demand.
+ SPG Architects 
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URL to article: http://inhabitat.com/striking-off-grid-house-on-the-osa-penninsula-in-costa-rica/
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 Email: mailto:?subject=http://inhabitat.com/striking-off-grid-house-on-the-osa-penninsula-in-costa-rica/
 Costa Rican: http://inhabitat.com/2010/05/21/son-builds-mom-a-bamboo-house-with-a-moon-view-in-costa-rica/
 SPG Architects: http://www.spgarchitects.com/work.php?section=3&project=70
 Image: http://inhabitat.com/2010/08/09/striking-off-grid-house-on-the-osa-penninsula-in-costa-rica/casa-torcida-3/
 large home: http://inhabitat.com/2008/10/09/is-it-green-frank-mckinney-megamansions/
 green building strategies: http://inhabitat.com../sustainable-building
 pv system on the roof: http://inhabitat.com/2010/06/28/virginia-techs-lumenhaus-wins-the-2010-europe-solar-decathlon/
 Image: http://inhabitat.com/2010/08/09/striking-off-grid-house-on-the-osa-penninsula-in-costa-rica/casa-torcida-15/
 rainwater collection: http://inhabitat.com../tag/rainwater-collection
 solar passive design principles: http://en.wikipedia.org/wiki/Passive_solar_building_design
 + SPG Architects: http://www.spgarchitects.com/
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