The Beaton Residence is the first Certified Passive House building in Massachusetts. The super-insulated design was refined through modeling using the PHI Passive House Planning Package to meet the stringent requirements of the Passive House specification. Through a very severe period during the 2010/2011 winter season, when temperatures remained below zero for close to a week, the home remained above 60 degrees with no heating while the family was away on vacation. All heating and air conditioning needs are easily met with a single mini-split air source heat pump. We are currently involved in performance monitoring of the home to quantify it’s performance.