Another thing to remember is the humidity levels. During this period, dendrobiums do not need a lot of moisture. Very little water will be enough to keep their roots alive. Also keep in mind that their roots constantly need plenty of air circulation so you should place them where there is a lot of fresh air.
Remember, that is based on energy usage, not comfort-levels, which are the purpose of having an air conditioner, in my not-so-humble opinion. Fact: At night, the ideal temperature comfort range for Americans drops to 65 to 72 degrees Fahrenheit (or about 87 degrees if you are my wife).
What is the right setting of temperature to keep the room cool? The recommended setting of your air conditioning temperature is 25C or 77F. It balances saving of energy in running your AC, and also set it to your comfortable temperature. If you donât enjoy a cool room at this setting, then, you can combine it with an electric fan.