heaters. Friendly Fuel Petroleum designs, installs, and maintains forced hot air furnace ductwork and other ventilation components. The company is a certified installer of Roth fuel storage tanks for long-term heating oil storage. It also provides repair, sales, service, and installation for central air conditioning systems, including commercial rooftop units and refrigeration. Customers can access 24-hour service when they hold a service agreement that covers tune-ups and maintenance checks.