Why Energy Audits is necessary?

The primary purpose of an Energy Audit  is to save money. If it is executed properly the results will outline the IDEAL combination of factors :

1. Reduce energy consumption
2. Reduce energy expense
3. Upgrade to more energy efficient technologies  

Save money while at the same time helps in maintaining an ideal environment. Replacing outdated technology with more energy efficient products is a common approach to reduce energy consumption.
 For Example:
If the building has been in use for a period of time the owner often hasn't any knowledge of what kind of lights are in use, what wattage bulbs they are using, or what options they have in the local market for utility providers. Natural gas heating is a perfect example. Simply switching to a new energy provider can often cut costs dramatically!