The chosen area of study is the brick chimney which provided heat, hot water and cooking facilities in the timber houses of Auckland 100 years ago. Demolition of these chimneys is common as adaptive reuse of the older houses of Auckland occurs. The number of chimneys present in four representative streets will be counted, using aerial photography from the 1940’s, and compared with the number present in recent aerial photographs. A long quotation, which provides good evidence regarding the importance of open fires for heating in New Zealand is given. Arguments for and against retaining chimneys and utilising wood biomass will be put, and these arguments will be placed in a context of urban resilience and of energy transition.