A technique was used for the wood front of the house called shou-sugi-ban, a traditional Japanese technique burning cypress wood to make it more sustainable. The wood is layered with bright orange planks. Solar collectors, which consist of double-glass tubes that minimize heat loss, form a cornice on the front facade of the house. A wind turbine is on the roof.  Photo 5 of 5 in A Passive House in the Netherlands Embodies 5 Tips to Consider When Planning Your Own