A little over a year ago I bought a 1920's house with the original oil boiler system. Having never owned a house and never seen this system before I had Genesee out to service it because some of tthe radiators were not getting warm. The service technician seemed unsure about how the system worked and bled the air off of the radiators which cost me over $100 and only fixed the system for about a week. This year when I switched to Rossoe and the technician came out for a new customer FREE tune-up, he completely explained how the oil burner system works and that parts of it no longer function properly. He also explained how to keep it working, add water etc.. SO glad I switched companies. Wish I'd done that sooner!