Amendments to Fuel Oil Code Adoption Document (CAD) 2025

Amendments to Fuel Oil Code Adoption Document (CAD) 2025

The Fuel Oil CAD is adopted by reference in Ontario Regulation 213/01 (O. Reg 213/01). The regulation applies to equipment where fuel oil is used as a fuel in the Province of Ontario. The CAD adopts a series of national safety codes into regulation.

National codes

TSSA proposes to adopt the latest edition (2024 editions) of CSA B139 series codes published by the Canadian Standards Association. The B139 series is arranged into four parts:

• CSA B139.1.0 covers general requirements for large installations;
• CSA B139.1.1 covers general requirements for stationary oil-burning engine installations;
• CSA B139.1.2 covers general requirements for special oil-burning equipment installations, and;
• CSA B139.2 covers general requirements for residential and small commercial building installations.

TSSA’s codes

In addition to the proposed Fuel Oil CAD amendments, TSSA is also in the process of updating the Field Approval Code (FAC) adopted by reference in the CAD. The FAC establishes the requirements for approval of appliances that are custom-made, built on site or produced in limited numbers.

Accessing the proposed CAD amendments

The text of the draft Fuel Oil CAD is available for public review and comment at engagetssa.org/fuel-oil-cad-consultation-2025.

Summary of new codes adopted in this draft CAD

The summary below highlights the notable changes from the latest editions of the codes that affect the safe operation of fuel oil equipment.

A Full list of changes from the 2021 edition of B139 series code to the 2024 edition can be found on CSA Group’s website: B139 (please click “Preface/Scope” tab in the menu).

Ontario-Specific Amendments Summary

The chart below highlights that three new Ontario-specific amendments are proposed to be added to the national codes.

In the draft 2025 version of CAD, TSSA has removed 10 out of 32 existing Ontario-specific amendments in the Fuel Oil CAD and added three new Ontario-specific amendments. In total, 25 Ontario-specific changes will continue to be enforced. Below is the change log.

Added (*Sections here refer to sections of the 2025 version of CAD)

• Clause 1.1.5 – Adds and modifies B139 1.0 section 4.2.4 in relation to conversion of fuel sources by deleting sub-clause (a) to remove an inapplicable reference to authority having jurisdiction and renumbering subsequent sub-clauses.
• Clause 1.1.13 – Adds and modifies B139 1.0 section 9.2.1 by deleting subsection (a) to remove an inapplicable reference to authority having jurisdiction and introducing a requirement that calculations be performed by a professional engineer.
• Clause 1.1.15 – Adds and modifies B139 1.0 section 11.3.1 by removing an inapplicable reference to authority having jurisdiction and introducing a requirement that calculations be performed by a professional engineer.

Removed (*Sections here refer to sections of the 2021 version of the Fuel Oil CAD).

• Section 1.1.3 AHJ Definition
• Section 1.1.3 Press-connect Fitting Definition
• Section 1.1.3 Press-connect Fitting background box
• Section 1.1.5 Appliance Definition
• Section 1.1.8 Piping and Tubing joints and connections
• Section 1.1.9 Concealed Piping
• Section 1.1.15 Overfill protection
• Section 1.1.16 Revocation
• Section 1.2.5 Skin-tight enclosures

Section 1.4.3 Joints and connection