This is a new house in the Katywil Farm Community, an intentional cohousing community in Colrain Massachusetts. It was designed as a Net-Zero house by the owner/architect Peter Brooks after taking Marc Rosenbaum's first NetZero design course. It is derived from the Capstone project from that course.  The house was built by Karsten Construction of Leverett. We have a heated walk-out basement that is unfinished but has a radiant slab floor and an unheated root cellar room. The house is a 26 x 34' rectangle with a secound floor that has shed dormers on the North and South sides. The house is sited facing slightly East of South on a South facing slope. It is designed with about 8% south facing triple glazed windows and small windows on the north. The walls are double studded 12" thick packed with dense cellulose. The roof was designed to have 18" of cellulose, about R60. The house was built quite tightly and tested at .8 ACH50. The house is ventilated by a Fantech Flex 100 ERV. The house is heated by a Daikin air to water heat pump that pumps hot water to the DWH indirect tank and the radiant slab and radiators. There is a 7.6 kW solar PV array of 30 panels, with half on the 45 degree sloped roof and half of the panels are on the top of the dormer roof at about 30 degrees.

 We have just received 12 full months of energy data and we seem to have generated enough power to be within 12% of NetZero. We need to generate an extra 671 kWh to offset the 24 gallons of propane that we used for cooking. We will add a monitoring to the system and refine our use until we meet our goal of Net-Zero.