Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a constant interior climate, something impossible to achieve by manual adjustments.
Requires no batteries or electricity.
It can be adjusted to start opening between 60...
Reviews
5.0
2 ratings
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Nice product
Works
R
Rob · December 27, 2024
Most helpful
Works great! I enjoy it so much, I’ll be ordering more in the future for my cold frames.