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).
When it is too cold you have to intensify the heat and add light while if it is extremely hot you have to vent the air as fast and effectively to produce new fresh air. Temperature. Maintain the daytime temperature favourable at 23 C(75 F) or below 29.4 (85 F) while at night it should be 20-22 C (68-72).If it drops drastically below that range, you should use a fan over the night to remove all the excess moisture from the air.hen it is too cold you have to intensify the heat and add light while if it is extremely hot you have to vent the air as fast and effectively to produce new fresh air. Temperature. Maintain the daytime temperature favourable at 23 C(75 F) or below 29.4 (85 F) while at night it should be 20-22 C (68-72).