Co2 questions

I have a room with a window. It is covered with black plastic. During the day i may open the window in the morning to let sunlight in. It also keeps the room cooler. It seems silly running CO2 when the window is open.

I run fans in the room as well. Should just run CO2 at night when they sleep and close the window? It is cool at night.

Should I run the fan on low or shut it off at night when the CO 2 is running? .

Most people usually say keep some breeze on indoor plants all the time to help control mites and other bugs. Thanks.

plants only utilize co2 while they are photosynthesizing aka during lights on. if you are concerned about temps don't have black plastic on your window during the day. also most people that run co2 typically run a little higher temp. keep your fans running all the time as one of the functions is removing the air in the immediate vicinity of the leaf surface that has higher humidity- keeps you from getting mold/mildew.