Universidad Politécnica de Valencia's DPClima is a Spanish-language program that helps size any system for heating and air conditioning of a building, i.e., the terminal units, the zone units, and the total capacity of the cooling or heating plants. It performs a 24 hour calculation of the steady state value of the cooling and heating loads of a building for a typical day of each month (either the coldest or the hottest), and creates a database with information about types of walls, glasses, human activities, type of lights, etc.