Our Oil guy has advertised this (Beckett heat manager, WWW.beckettcorp.com) and it is gaurenteed to save 10% of your oil consumption and may save as much as 20%. Anybody had any experience with this? It costs about $185 to buy and another $80 to install. If I used 700 gal of oil last year and oil will cost around $2.25 gallon, I would save at least 70 Gallons (10%) so a savings of about $157 this year. Doesn't sound bad if it is true. Let me know what you think.