Solar air heaters are passive solar element that can heat rooms during cold days while the sun is shining. Building one is a piece of cake
Solar air heaters typically consist of a collector, which are installed on the side of a building and used to collect solar energy. The collected solar energy is then used to heat air, which is circulated through the building using convection or a fan or blower. Solar air heaters are an environmentally friendly and cost-effective alternative to traditional heating systems that use fossil fuels, such as natural gas or propane. They are particularly well-suited to climates with plenty of sunshine, as they can take advantage of the sun's energy to heat a building. Some solar air heaters can be installed on the outside of a building and are designed to blend in with the architecture, while others can be installed on the roof or inside the building.