The Energy House will hold its next Education and Demonstration Showcase, Energy House Six, on April 27 and 28 from 11 a.m. – 5 p.m. at 2617 N. Nottingham St. in Arlington. Built by Arlington Designer Homes LLC, the home features a living green roof and an advanced storm water management system. The N. Nottingham property has additional energy features not normally seen in new construction such as passive solar gain, water reclaiming rain gardens and LED lighting. Energy House is a partnership of companies in the Northern Virginia area that work together to provide residential energy upgrades through weatherization, insulation, smart technologies, solar thermal, HVAC, and geothermal.