Sundance Housing Co-op is a 59 unit, 1970’s townhouse complex consisting of 15 buildings with 2 to six units per building.
So energy efficient that all of the energy for heating, cooling, hot water and lighting and appliances can be produced from (usually onsite) renewable sources.
Deep Energy Retrofits reduce building energy requirements to net zero levels. The remainder can be obtained from renewable zero emissions sources.
A deep energy retrofit where the work is done entirely on site.
A deep energy retrofit using prefabricated panels to wrap the building walls, and often the roof, in a warm new enclosure.
Retrofitting a building a little at a time. Very difficult to achieve net zero without very careful planning and sequencing. The pieces seldom add up to enough for net zero.
Retrofits where only one or two components of the building envelope are improved. Without energy modelling, it often makes it harder to ever get the building to net zero.