The building’s envelope is composed of super insulated polyurethane SIP wall and roof panels and high performing low-e coated argon filled glazing. The 1,490 sf of finished main level is heated with a hydronic radiant heat system that uses the mass of the lower level slab to maintain a comfortable environment. The heat stored in the slab naturally radiates up through slots, directing warm air past the main level glazing and is returned through the open stair, completing the convection cycle. Outside air is filtered through a heat recovery ventilator, bringing fresh air into the home without sacrificing thermal performance.