Mollier h,x-diagram

Drag a rectangle on the diagram to zoom (click to reset). The sliders set the diagram domain and the comfort zone (shown as the green polygon, with dashed orange/red tolerance bands). Switch the coordinate convention between classical and Glück. Set the altitude with the slider (default 450 m a.s.l.) or enter a pressure — the other follows automatically (the value is shown top-right of the chart). To plot your own data, upload a .csv with three columns: time (ISO 8601), humidity [%], temperature [°C]. Meteonorm hourly .dat files (year, month, day, hour, temperature, rel. humidity) are recognised automatically. Points are coloured by season. The example data set (zuerich-kloten.csv, hourly outside air of one year) is loaded on start. The black dot is the current room state, the hollow blue circle the outside air; the dashed line between them is the ventilation (mixing) line, and the note above the diagram says whether airing dries the room or adds moisture (outside air drier or moister by more than 0.3 g/kg). A point outside the axes becomes an arrow on the edge with its value — try an outside temperature of −25 °C.