Soot Blowing on Oil Conversions
On oil conversions, some existing convection tubes may have to be removed to provide lanes for the soot blowers. Some undesirable loss of surface results. Also, the tall, thin, tightly spaced fins typical of gas fired convection sections cannot be cleaned effectively by soot blowers. Shorter, thicker, more widely spaced fins are needed.
For these reasons, on conversions to oil firing, it is usually best to simply remove the existing convection section and provide a new one specifically designed to be compatible with oil firing. Often, particularly on older furnaces, this disadvantage can be turned into a big plus: the new convection section can be designed for greater efficiency and better fuel economy.