House M comes from Caramel Architects and is located in Linz, Austria. The first striking thing about this house is its exterior design: two facades have a hermetic appearance in order to prevent passers by from looking inside, while the other two feature windows from floor to ceiling. This design allows the building to receive plenty of natural light throughout the day, which is just one of the factors due to which this construction can be called highly economical and ecological. House M is built from prefabricated materials and has cellulose-fiber thermal isolation. The kitchen and dining rooms are spacious and open areas and offer great views of the near by pond.