Quarles Energy Services (QES) is fuel distribution company. The company distributes fuel oil, propane and heating oil to residential and commercial customers. The company provides services like fuel delivery and sale and installation of energy products include Heating Systems, Air Conditioning Systems, Air Purifiers and Humidifiers for homes and business. The company has operating locations in Virginia, Maryland, West Virginia, North Carolina, Delaware, and Pennsylvania. The company is headquartered at Fredericksburg in Virginia, the US.