Don and Gerry - Grand Marais, MN
Energy Features: Solar hot water for domestic hot water and space heating, Photovoltaic system for electricity, Radiant in-floor heat (lower left), Double pane low-E windows throughout,
6-inch thick walls with 5-1/2" thick spray foam insulation (upper right); 24 inches of cellulose insulation in roof, Energy efficient whole house air exchanger with counter current heat recovery,
High efficiency SunFrost refrigerator, Fluorescent lighting throughout
Photovoltaic system: Totally off grid, 2600 watt PV system with 4 kW (8 kW peak) inverter and 35 kW-hr battery storage system (lower right),
4000W propane-fired generator for backup, PV system expected to provide > 80 % of annual electricity usage
Solar hot water system: 10 m2 solar collection system (~5000 kW-hr/day),
Integrated to provide both domestic and space heating hot water, 96 % efficient condensing propane boiler for backup