The Chronicle Herald of Canada reports from Dartmouth, Nova Scotia, near Halifax, that a 1,500 square foot modular home has been termed the most energy efficient home in the Province by the designer, Axel Lerche.  Before the house is sold in three to four months, it will be an educational center for regular public presentations about energy conservation.  Built by Maple Leaf Homes Ltd of Fredericton, the home features geothermal heating and cooling, photovoltaic cells for electricity and hot water heated by the sun.  A family lives in a similar modular home that was built in 2009, and their energy bills are $19 a month.