As a general guideline, and using the correct configuration and installation methods, the typical destratification fan savings calculator will show that the installation of these fans can save a business up to 30% of their energy costs. According to the United States Department of energy, for every 1 degree in lowered temperature at the bottom layers of air in the room, there is approximately a 3% saving in energy. This is due to the even air temperature throughout the space, preventing constant cycling on and off to try to maintain the correct temperature.
It is important to realize that not all destratification fans are as effective as the top lines and that the choice of fans and the positioning of fans throughout the space also has an impact on the results from a destratification fan savings calculator and the actual results.
The Factors to Consider
When looking at the results from a destratification fan savings calculator, be sure to consider all issues. For example, the most energy efficient of the destratification fans on the market use less energy than a light bulb or about 23 watts. At the same time, these fans are in use, the massive HVAC systems are not cycling on and off as frequently, and they are also not running for as long, resulting in less overall energy use and greater cost savings.
Another factor that comes into play in the calculation is the issue with hot and cold spots in the space. Depending on where thermostats are positioned, these hot and cold spots can be triggered additional energy use of the HVAC systems. With the use of destratification fans circulating the air and maintaining an even temperature throughout the space, this is eliminated.
As mentioned above, it is critical to correctly position the destratification fans in the room. To maximize the energy and cost savings of running these fans, they have to be installed in areas that enhance air movement and break up stratification layers.