OBC DIVISION B · PART 6 — HEATING, VENTILATING AND AIR-CONDITIONINGUpdated for the 2024 Ontario Building Code

Section 6.4 — Heating Appliances

Full text of Section 6.4 (Heating Appliances) — Division B, Part 6 (Heating, Ventilating and Air-Conditioning) of the 2024 Ontario Building Code, with every article reproduced below.

On this page:
6.4.1.1.6.4.1.2.6.4.2.1.6.4.3.1.

6.4.1.Heating Appliances, General

6.4.1.1.Location of Appliances permalink →

(1) Except for appliances installed in dwelling units, fuel-fired heating appliances shall be located, enclosed or separated
  from the remainder of the building in conformance with Section 3.6. (See also Subsection 9.10.10.)

6.4.1.2.Appliances Installed Outside the Building permalink →

(1)   Fuel-fired appliances installed outside a building shall be
  (a)   designed and constructed for outdoor use,
  (b)   installed not less than 1 200 mm from the property line, measured horizontally, and
  (c)   installed not less than 3 m from an adjacent wall of the same building when such wall contains an opening or
        openings within 3 storeys above and 5 m horizontally from the appliance, unless such openings are protected by a
        closure assembly having a 45 min fire-protection rating determined in conformance with Article 3.1.8.4., or by
        wired glass conforming to Article 3.1.8.14.

6.4.2.Unit Heaters

6.4.2.1.Clearances permalink →

(1) Every unit heater using either steam or hot water as the heating medium shall be installed such that the clearances
  between the appliance and adjacent combustible material conform to Table 6.7.1.2.

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

6.4.3.Radiators and Convectors

6.4.3.1.Lining or Backing permalink →

(1) A noncombustible lining or backing shall be provided for every steam or hot water radiator and convector
  (a) located in a recess or concealed space, or
  (b) attached to the face of a wall of combustible construction or encapsulated mass timber construction.

  (2) Every steam or hot water radiator and convector shall be installed so as to conform to the clearance requirements of
  Table 6.7.1.2.

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

Understand any provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.