Fuel Safety Bulletin 2006-02

February 23, 2006
Rev. 1 - July 19, 2006
Rev. 2 - May 3, 2007

Subject: Conversion of existing boilers to natural gas

This policy refers to existing, in-service boilers for which the manufacturer does not make a certified gas conversion burner, one for which the manufacturer is no longer in business, or one into which the installer will install a burner not tested and certified for use in the particular boiler. New boilers must be certified for the fuel to be used.

The following information shall be submitted to Fuel Safety Section for plan review prior to starting the conversion. Upon review of the submitted documents Fuel Safety Section may or may not grant approval for the boiler to be converted.

1. A letter from the Boiler manufacturer or Burner manufacturer, on company letterhead, stating that the burner (make, model and serial number) is compatible with the appliance (make model and serial number). The letter shall also include as a minimum the following supporting documentation;
   1. Combustion chamber geometry,
   2. Flame dimensions,
   3. Min and max pressures, and
   4. Required combustion setup (acceptable O₂, CO, CO₂ and stack temperatures).
2. A letter stating that the boiler will be thoroughly cleaned and inspected before conversion, and
3. A CSA Special Inspection form and the applicable fee.

Sincerely,

Dale C. Stewart
Chief Inspector - Fuel Safety