Improving insulation, using efficient heating systems, and optimizing natural lights are all ideal ways to save energy in a winter greenhouse. Insulating the greenhouse properly is essential; using double or triple glazing for the windows and adding thermal mass, such as water barrels or concrete, can help store and release heat throughout the day and night. Sealing gaps and ensuring the structure is airtight reduces heat loss, minimizing the need for external heating. Greenhouse covers, such as double layers of polycarbonate or polyethylene, provide extra insulation and reduce heat loss while still allowing sunlight to penetrate.
Passive solar heating, by positioning the greenhouse to maximize sunlight exposure and using materials that retain heat, can also reduce energy costs. To further conserve energy, use energy-efficient heating systems like electric or propane heaters with thermostats, which can be set to maintain a consistent temperature without overusing power. Using LED grow lights instead of incandescent bulbs helps reduce electricity consumption. Consider using thermal curtains or shades at night to retain warmth and prevent heat loss.
