What is the purpose of thermal screens in a greenhouse?

The purpose of thermal screens in a greenhouse primarily revolves around their ability to reduce heat loss and improve temperature stability. These screens are designed to retain heat during cooler periods, which is crucial for maintaining optimal growing conditions for plants. By doing so, thermal screens help to minimize energy costs associated with heating, as they create an insulated barrier that keeps warmer air trapped inside the greenhouse.

Additionally, by improving temperature stability, these screens can help in regulating the internal climate, preventing extreme temperature fluctuations that could be detrimental to plant health. This consistent environment is essential for promoting robust growth and reducing stress on plants, ultimately leading to more productive yields.

While other options like filtering sunlight or creating decorative features may have their own merits, they do not capture the primary functional role that thermal screens play in greenhouse management. Similarly, while keeping out insects and pests is critical for plant health, it is not the main purpose of thermal screens, which focus on thermal regulation and energy efficiency.