How to reduce air conditioning costs in buildings and homes
By MDS . C19 news
November 2 2020
The white color reflects the sun's rays instead of absorbing them, the "cool roofs can have a temperature up to 30º C lower than conventional darker roofs, thus reducing the interior temperature by 3 to 5º C.
The Mediterranean countries had understood this for centuries, like Greece, Italy, Morocco, Algeria with cities like Casablanca (white house) and Algiers, nicknamed, 'Algiers the white, these countries have particularly hot summers.
In the 20th century, architects have abandoned this age-old construction method for more futuristic technologies and design. Since the beginning of the 21st century, this process, which has proven itself for thousands of years, has found a favorable echo among ecologists and since then has aroused a real interest .
In France, the Breton company Cool Roof has already repainted in white the roofs of several supermarkets and public buildings, In India, the city of Ahmedabad, after undergoing a severe heat wave.
In the USA, between 2009 and 2019, the city of New York has repainted more than 100 million square feet of roofs in white, which allowed the buildings concerned to save more than 30% of the costs related to air conditioning.
In a recent BBC interview, the former UN Secretary General Ban Ki-moon suggested that this reduction could be as much as 30C, with the internal temperature of the building falling by as much as seven degrees.