Climate and Building

Based on the effective climate classification according to Köppen–Geiger for a representative number of several hundred cities the hourly values of a year for the outdoor air temperature and the absolute humidity were projected in a psychrometric chart. This provides an outline of a location’s climate that shows whether heating or cooling, humidifying or dehumidifying is required, or whether we are dealing with a temperate climate, which places no major demands on building climatology systems. The international standard ASHRAE-55 is used to define a comfort area for low wind speeds. It also shows in combination with the cooling and heating degree days as well as the (de)humidifying gram days whether a comfortable indoor climate can be achieved by taking passive measures or whether active cooling is needed throughout the year.


The building specific climate classification (Liedl, 2011) with its main- and subtypes demonstrates the geografical correlation with regard to the latitude, altitude and continentality as a result of the building specific analysis. The maintypes and geografical influences are shown with a typical representative for the local climate in the cool and temperate climate as well as in the subtropics, tropics and in the deserts.

Depending on the outdoor air temperature and humidity all locations worldwide can be divided into building specific climate zones. Consequences are currently available for the climate according to the latitude, altitude or continenality.