Design: One SEED Architecture + Interiors (www.oneseed.ca) Photography: A. Holden-Pope ENTRY ON TO DINING AND KITCHEN True sustainability deals with the ‘three pillars of sustainability’, which include the environmental, but also the social and economical. The Narrow Passive House responds to each tenet with an understated elegance. This eco-conscious home is designed to take advantage of the earth’s never-ending capacity to heat, cool, and ventilate, while using materials and building systems which are durable and tread lightly on the environment. It boasts a green roof and three storey thermal mass wall.