The Passivhaus method was influenced by the Saskatchewan Conservation house project. Quoting from http://esask.uregina.ca/entry/energy-efficient_houses.html htt

The Passivhaus method was influenced by the Saskatchewan Conservation house project. Quoting from http://esask.uregina.ca/entry/energy-efficient_houses.html http://esask.uregina.ca/entry/energy-efficient_houses.html : > It had no furnace; instead, the house was heated with a solar heating system designed specifically for Saskatchewan’s extreme Climate.