A great achievement is that the Puerto Piramide’s building code was modified based on sustainability parameters introduced by Del Nómade Eco Lodge. To achieve this goal, we first constructed a building of 400 m2, consisting of a ground floor, first floor and second floor with separate entrance for a private apartment. The heat balance optimization was the first step to prevent heat loss, which is why we started by building solid walls and large windows all sealed with double glazed (DVH) to avoid unnecessary heat loss and allow the entry of solar energy as light and heat. This is our renewable energy system applied in winter. The heating and hot water.