The use of detailed building energy simulation tools is less common in the design of residential buildings than for non-residential buildings. Simple tools exist, but they rarely include detailed daylight and airflow models as offered by the detailed tools. The Energy and Indoor Climate Visualizer offers the detailed analyses necessary for holistic design of sustainable residential buildings while providing a fast, simple and intuitive user interface. The simulation engine is based on the existing and validated tool IDA ICE, which provides a detailed coupled thermal and airflow model that calculates ventilation and infiltration airflows based on driving forces for each of the dynamic time-steps, as well as temperatures and energy flows. The user interface is based on 7 tabs which guide the user through the simulation process. The results presentation is based on a single, printable report which summarises all main results on energy, air quality and thermal comfort. Ventilation flows through windows can be animated and temperatures can be investigated on a daily or weekly level. Temperatures are evaluated based on the comfort categories of EN 15251 which vary with the outdoor temperature for naturally ventilated buildings.