Weather responsive ventilation - The automatic window opener senses weather changes and automatically adjusts greenhouse ventilation to temperature fluctuations in the 20-25 C range. Suitable for most greenhouses. It automatically opens or closes windows to regulate temperature and support healthy plant care. Easy replacement - This replacement cylinder is designed to replace the automatic window opener, ensuring worry-free maintenance and operation of the greenhouse ventilation system. It is durable, robust and easy to install. Wide compatibility - Fits most greenhouses up to 33 cm. This solar powered, time saving solution automatically opens or closes windows to ensure air circulation and temperature control for optimized plant growth. Time and labor saving - The replacement cylinder reduces manual work and saves time while providing better temperature conditions for plant growth. It is robust and easy to use. Practical use scenarios - Hot day ventilation: On sunny days the opener automatically vents to prevent overheating and maintain a healthy microclimate for crops. - Seedling stage care: Maintains a stable temperature and air flow for young plants during early growth. - Maintenance and replacement: Use as a cylinder replacement to restore performance of aging or malfunctioning automatic window openers, reducing downtime.