METHOD AND APPARATUS FOR DETERMINING FUEL USE EFFICIENCY FOR COMBUSTION SYSTEMS

A method and system for determining fuel delivery frequency and volume for a combustion system is provided. A delivery history of fuel deliveries to a fuel combustion system fuel storage tank is collected. The heating degree days for each time period between deliveries is ascertained. The volume of fuel used per day between each delivery is then calculated. A relationship is then established between volume of fuel used per day and heating degree days per day, for the plurality of fuel deliveries for the combustion system. Desirably the relationship is established by plotting the volume used per day vs. heating degree days per day for the combustion system. A desired volume of fuel for the next delivery is chosen. The number of elapsed days from the last delivery and the elapsed number of heating degree days per day are tracked. Periodically, the expected fuel use is calculated using the relationship.