In the beautiful district "De Esch" in Rotterdam, a radical transformation of the so-called Snelfilter building has taken place. Sustainability is central to this transformation. The building on the Watertorenweg is now the last of the 3 buildings that has been given a residential destination and is recognizable by the semicircular central roof. In this beautiful building, Rotsvast offers 45 studios and apartments for rent. All homes have energy label A and have a high-quality finish, neat laminate floors, a modern kitchen with appliances, a bathroom with floating toilet and modern shower fixture. Tenants can use both the communal roof terrace and the courtyard garden. In the basement there is a basement box of approximately 8 m2 per house. Additional costs: * advance payment for water, electricity and district heating: € 174,- * service costs of € 90,- per month for communal facilities. * Cable Internet: € 25 per month. Smoking not allowed, pets in consultation. History of the building: The water tower from 1875, designed by city architect C.B. van der Tak, had a reservoir of 1 million liters of drinking water, then the largest in the Netherlands.\[2\] The construction of a system of pipes through which pure water could be transported was an important means in the fight against cholera and other infectious diseases. The Rotterdam Drinking Water Supply (DWL), founded in 1874, moved to the Schaardijk next to the Van Brienenoord Bridge in 1977 and has since been merged into water company Evides. The tower (now partly a restaurant), the pump houses and other outbuildings were declared a national monument in 1981. Interested parties can register for a viewing by e