Passive cooling and heating techniques can boost your home or establishments energy efficiency. Such techniques make the most of the sunlights heat, a trees shade, a buildings air current, and the outside breezes, as well as a solid materials ability (including the ground)to keep heat from the direct sunlight or to remain cool when theres a shade. Passive cooling and heating techniques had been around for a long time now. However, they were ultimately ignored as our modern technologies and advancements pave the way to heating up rooms through the use of fireplaces first, and then central cooling and heating much later. But our growing concern on rising carbon dioxide emissions and footprints from heat powered by fossil fuel or electricity sparked interests on other cooling and heating methods that does not negatively impact our environment and hasten global warming.
Passive houses utilizes less outside energy required to cool down or heat up space. But it is not easy to come up with a fully-passive home. It is hard to come by one that is in an ideal location and can access an alternative power source like solar panels, windmills, or a wind turbine. These passive houses are one-of-a-kind. But we can all try to incorporate plenty of passive techniques among typical-style houses considering if they are located in places with gentler climates and does not extreme cool or warm weather for a long time.
A Look at Passive techniques in Nature over the Years
To boost energy efficiency, a lot of people checked out ancient passive cooling and heating methods.The ancient Romans and Greeks and the US Pueblo Indians were knowledgeable at positioning their buildings to ensure that the ones often used faces the equator, where they are exposed to the sun the entire day. Sone and adobe-covered hay bales absorb the suns heat and release it during nighttime.
All over the world, countries like Africa, Scandinavia, Japan and the US, people dug the ground when making their shelter. An earth-sheltered structure enjoys the cooler temperature of the ground during summer, and the warmth it provides when winter comes. Dugouts or pit homes have different styles. Some look like holes sporting sloped roofs, while others appear as structures dug on the sides of a hill. Ancient Europes rock shelters, The American Southwest Anasazi cliff homes, and Dogon dwellings of the Bandiagara, the nation of Mali in West Africa, are all in-hill varieties. Another ancient abode are underground type shelters. An example of the oldest ones are in Skara Brae found in Orkney Islands, Scotland. They are believed to be 5,000 years old.
For a long time, dwellings in places with warm and wet climates are constructed to accommodate humidity levels.Conventional Malaysian homes is an excellent example. Its foundation are stilts that allow airflow to get inside from below. Meanwhile, the walls are designed not to absorb heat or sunlight. Its insides are open to allow air to flow freely inside the house. It likewise comes with a high roof peak to let the warm air go up and out the building.
In arid nations like Ancient Persia (Iran nowadays) and other warm places,courtyard are built inside structures. These shaded courtyards are central to the buildings letting the cool air get inside. The fountain in a courtyard enabled evaporative cooling through the flowing water. Iran is moreover known for its badgirs or popularly known as windcatchers. These badgirs are open towers that catches the wind and offer a natural ventilation for the structures. When theres no breeze, it lets the warm air go out of the building. One more thing that has a similar function is a thermal chimney. The dark chimney absorbs heat and creates an updraft from the heated air that rises inside. It is capable of pulling the air from the entre building leading to air movement and cooler air to get in.
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