Greenhouses need to be designed to not only capture solar technology but also adequately ventilate extra heat if temperature ranges get too hot.
You should always make sure you have sufficient vents in the roof of your greenhouse as heat rises and you want that heat to escape.
Greenhouse roof vents function really well as they are located where hot air gathers naturally at the peak of the roof.
If vents in the roof are not possible, be sure to at least have a windows to two you may open.
Ideally you wish to have cross ventilation therefore two windows on two sides of the greenhouse work best.
However you shouldn’t leave the vents or windows open at nighttime as you’ll lose any kind of heat gain and cool your greenhouse an excessive amount 
of.
So you close the vents or windows at night and what happens the next morning: you forget! Right now your greenhouse overheats and if you’re unlucky, you lose some plants.
Or you forget to close the vents at nighttime and your plants suffer if the night is too cool.
We’ve listened to from numerous people that utilised Ventilador automático de invernadero as well as are entirely pleased.
