The easiest and most reliable way to avoid this is to set up automated greenhouse vent openers.
The last thing you would like to have happen is for your plants to perish because they literally were cooked.
The sun is a robust way to obtain energy and a little greenhouse can reach blistering temperatures in only a few hours.
After all that’s how they were created. To capture solar energy.
greenhouses have light-weight roof vents and could require a more powerful vent opener to maintain them closed or prevent them becoming blown 
away – check before you buy.
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If you have a greenhouse, you know how quickly it could heat up on a sunny day, even in winter.
You may make sure your greenhouse ventilation is constantly regulated during hot summertime, whether you’re at home or not, by installing an automatic vent opener. It includes a wax that expands when heated, opening the vent. When the temperature falls, the wax contracts and the vent closes.