Controlling your indoor Environment is the main aspect of high yielding fruits indoors. it is very important to know the Temperature, Humidity and Co2 of your Grow Room.
To control this you will need Extraction Fans for intake and outtake too remove hot stale air and push in Cold Co2 Rich air. This is called Air Exchange, Humidifiers or Dehumidifiers are also used to maintain the perfect conditions if this is not correct poor plant health is guaranteed. Rule Number One Perfect Enviroment.