thank you ^ ^
winter when temperatures are very low I heat with a small fan heater 2000w and when it gets really cold I heat with a hotbox of 2800W.
I was the 30 ° C maximum. to limit the temperature I have a fan + net shading 70% + a misting every hour and I open the 2 doors of the greenhouse.
the hydrofogger lowers temperatures around 5 ° C
yes it is the fog effect achieved with the hydrofogger
a little video of the greenhouse