There are several ways to regulate the temperature of a grow room. The first method is by using fans. Fans can be placed in strategic locations around the grow room. These fans will circulate air and cool the grow room. Fans can also be used to warm the room. Some growers place a fan on the ceiling of the grow room and then also run a fan on the floor. This will circulate hot air from the grow room and keep the cool air near the floor. Fans are effective, but they only circulate the air in the immediate area. Another method to regulate room temperature is by using a thermostat. A thermostat will help regulate the temperature of your grow room. A good thermostat will give you the option to set the temperature and humidity manually. This way you can control the humidity and the temperature in your grow room with ease. There are many different types of thermostats on the market. Some are analog and some are digital.