My oil company just installed this kit in/on our oil burner and charged me $323.60 ($203.60 for the kit and $120 for 2 hours o/t labor). They also tell me the vent hood and fan have rusted and should be changed. The system is six years old and uses a power vent to the outside. Since I know "nothing" about oil burners, can anyone tell me if they "think" this sounds right or??? Thanks.