click on photos to enlarge
The C3 Prefab project, is a prototypical example a prefabricated sustainable residence (Chicago’s first) constructed in an urban environment.
C3 sets a high standard for energy efficiency by surpassing the current energy code by 54%, and becoming the first model for sustainable, affordable housing in Chicago. Reducing the upfront cost of housing is only part of the equation. The compounded savings by reducing energy usage gives homeowners an additional $282,000 at 10% over a 30-year period.
The C3 was designed to meet the LEED Platinum and Energy Star standards with low-tech, common sense solutions in lieu of expensive gadgetry. Many materials used were sustainably harvested as well as sourced through local vendors to encourage economic growth within the region. To date, this project has received Energy Star.
Relative to this project, the word ʻprefabʼ means that portions of the home were constructed off-site and shipped to the project location once the foundation and utilities were prepared. There are many prefab benefits. There’s a higher level of quality control within a factory setting. No “bad weather” means year-round, simultaneous construction for speedier delivery and timelines are more predictable. And an economy of labor and material Reducing labor and through the use of repetitive assembly lines and volume purchasing.
[ sustainable materials | benefits ]
• Uses 54% less energy and produces 64% less emissions then a comparable home. • Energy savings of over 70% in water heating costs due to solar thermal panels and on-demand water heating.
• Recycled content, low-maintenance exterior siding (galvalume corrugated and fiber cement board), and reclaimed barnwood siding.
• Low-VOC water based sealants and finishes; cabinetry and woodwork that contain no formaldehyde or toxic binders.
• Water-conserving plumbing fixtures and energy-efficient appliances and lighting; at least 80% of lighting is either compact fluorescent or LED.
• Recycled/sustainably harvested flooring (hickory and cork).
• Efficient floor plan with high ceilings and substantial natural light and ventilation reduce lighting and heating/cooling loads.
• Ductless, high-efficiency heating & air conditioning system provides quiet operation and controlled zoning for higher level of interior comfort.
• Heat Recovery Ventilator (HRV) provides continuous outdoor air circulation without energy loss.
• Natural native landscaping provides minimal maintenance and utilizes reclaimed storm water for irrigation.
• Roof is designed for future roof deck, vegetated green space, and photovoltaic (electricity producing) solar panels.
• All wood framing is FSC certified.
[ project data ]
designer: architect square root architecture + design jeffrey sommers
location: chicago usa
project size: single-family | 2039 sqft
hers rating: 46
[ resources ]
manufacturer: Hi-Tech Housing
general contractor: Helios Design + Build
energy consultant: The Sylvan Company
green rater/energy rater: Energy Diagnostics
interior furnishings: Post 27
landscape architect: KMS Gardens and Design
solar panel design & installation: Solar Service, Inc
mechanical consultant and installation: Ardmore Fresh Air
window consultant: Murphys Windows
[ materials and products ]
hvac system: Fujitsu Ductless
windows & doors: THV Compozit
kitchen & bath cabinetry: EcoUrban Collection
lighting consultant: Lightology
low-vov paint: Color Eco Paint Boutique
corrugated galvalume siding: Firestone UnaClad
cement board lap siding: James Hardie
floor & wall tile: Dal-Tile
tankless water heater: Noritz