Greenhouses have to be designed to not merely capture solar technology but also adequately ventilate extra heat if temps get too hot.

You should always make sure you have adequate vents in the roof of your greenhouse as heat rises and you want that heat to flee.

Greenhouse roof vents work really well because they are located where hot air gathers naturally at the peak of the roof.

If vents in the roof aren’t possible, make sure to at least have a windowpane to two you may open.

Ideally you want to have cross Greenhouse Auto Vent ventilation therefore two windows upon two sides of the greenhouse work greatest.

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.

Which means you close the vents or windows at night and what happens the next morning: you forget! At this point your greenhouse overheats and if you’re unlucky, you lose some plants.

Or you forget to close the vents at nighttime as well as your vegetation suffer if the night time is too cool.