The easiest and most reliable way to avoid this is to install automated greenhouse vent openers.
The last thing you wish to have happen is for your plants to perish because they literally were cooked.
The sun is a powerful source of Automatic Greenhouse Vent 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 may require a stronger vent opener 
to maintain them closed or prevent them getting impressed – check before you buy.
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For those who have a greenhouse, you understand how quickly it could heat up on a sunshiney day, even in winter.
You may make sure your greenhouse ventilation is continually regulated during hot summer months, whether you’re in the home or not, by installing an automatic vent opener. It contains a wax that expands when heated, opening the vent. When the temperature falls, the wax contracts and the vent closes.