Via @jetsongreen, two ultra-efficient attached homes on Stuart St. in Denver, Colorado, featuring “a super-insulated envelope, Energy Star windows and appliances, high performance lighting, … ”

“… window placement optimized for cross-ventilation, a high-efficiency furnace and water heater, on-site solar, water-efficient fixtures, drought-tolerant landscaping, low-VOC paints and finishes, recycled content products, and LEED Gold, EPA Indoor AirPlus, and Energy Star certifications.” More at Imagine Infill LLC. Photos: Imagine Infill.