What is a puff back?A puff back occurs when you start your boiler or furnace without proper ignition. When that happens, oil or gas vapors build up until your boiler finally ignites causing what is called a “puff back”. This incident can result in anything from a small amount of smoke to an actual minor explosion, depending on how much fuel has been accumulating in the ignition chamber. A puff back can be extremely dangerous to the structure of your home and to your health. When this kind of backfire happens, the soot and smoke in the heating exhaust system are forced out into your property. Puffback occurs in both oil and gas furnaces, boilers, and water heaters. However, as oil does not dissipate as fast as gas, oil-fired furnaces and boilers are more prone to puff backs.
What causes a puff back?A generic cause affecting all types of boilers and furnaces is the lack of maintenance or outdated equipment. More specifically, puff backs can occur due to these reasons: Oil supply piping leak
- Poor Chimney or Heater Installation
- Heater Shutdown Problems
- Oil Spray Nozzle issues (damaged or clogged)
- Combustion Gas Venting issues