Solar heaters are devices that use energy from the sun to heat water or air for residential and commercial use. They typically consist of solar panels that capture sunlight and convert it into heat, which is then transferred to water or air circulating through the system. This process can significantly reduce energy costs and reliance on fossil fuels. There are two main types of solar heaters: solar water heaters and solar air heaters. Solar water heaters are designed to heat water for domestic use, such as in showers and swimming pools, while solar air heaters warm the air for space heating in buildings. Both systems contribute to a more sustainable energy future.