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MARKET STRATEGY
The 4D Home is a 945-sq.-ft., two-bedroom New England design for a family of three (mid-thirties couple with young child) and $100,000 annual household income.


 


A second sliding wall creates a flex space from grand dining to more intimate dining. It also creates a transition between a bedroom and home office.


 


INhome. Both two-bedroom homes are relatively affordable, 4D Home coming 4th in affordability, at estimated costs of just under $268,000. Similarly, the two homes were also close in market appeal, with 4D fourth and INhome fifth among the 19 contestants.


4D Home employs a combination of fiberglass and closed-cell polyurethane spray foam insulation to achieve R-56 walls, an R-57 floor and R-64 roof. The home is so tight that it achieves 0.6 air changes per hour (ACH) at 50 pascal (Pa). To maintain healthy air exchange, a heat recovery ventilator (HRV) brings in fresh air, while recapturing as much as 85% of the exhausted air’s thermal energy. Team Massachusetts did not achieve net-zero status during competition, but the team did take second place in the energy balance category.


The 4D structure also presents creative combinations of solar technologies. Hybrid-solar hot water collectors bootstrapped to the back of the PV panels capture the PV panels’ excess heat. This double-solar heated water (collected in the solar hot water tank) provides 90% of the domestic hot water.


Inside, opening or closing two central partition walls easily reconfigures the home. Open the walls to create expansive space for family celebration. Close them up to create more private spaces. The two bedrooms can be easily reconfigured to one bedroom with a home office. GB


 


DIGITAL ASSETS
> Project Manual www.solardecathlon.gov/past/2011/pdfs/mass_manual.pdf
> Construction Drawings www.solardecathlon.gov/past/2011/pdfs/mass_cd.pdf
> Menu and Recipes www.solardecathlon.gov/past/2011/pdfs/mass_menu.pdf
> Engineering Presentation (docs) www.solardecathlon.gov/past/2011/pdfs/2011_engineering_mass.pdf


Video Links
> Video Walkthrough www.youtube.com/watch?feature=player_embedded&v=YEH1dAm4DEI
> Architecture Presentation www.solardecathlon.gov/videos_team_architecture.html#mass
> Engineering Presentation www.solardecathlon.gov/videos_team_engineering.html#mass
> Sales Presentation www.solardecathlon.gov/videos_team_sales.html#mass


FOR CLICKABLE URL LINKS, GO TO WWW.GREENBUILDERMAG.COM/DECATHLON


52 01.2012 www.greenbuildermag.com

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