This is in the summer. I can roll up a heavy tarp at the back of the greenhouse to vent the heat. There is black mesh fabric that still keeps the birds out. I also have a homemade control system using a Raspberry Pi. The system sends the temperature, humidity, and system status to the house. I control the system from a webpage on my laptop. The system uses two 300 gallon tanks that I got from the recycling center for $70! I use a submercible pump to pump the water to the irrigation system. The whole system, including the LED lights and vent fans run off a solar/battery system. So the whole system is independant of power and water. The water is pumped from more tanks that are filled with rainwater from the roof of the house!