Division B
Acceptable Solutions

Part 6 — Heating, Ventilating and Air-conditioning

Section 6.3. Chimneys and Venting Equipment

6.3.1. General

6.3.1.1. Requirement for Venting

1) Except as provided in Articles 6.3.1.2. and 6.3.1.3., the products of combustion from oil-, gas- and solid-fuel-burning appliances shall be vented in conformance with the requirements in the applicable appliance installation standard listed in Article 6.2.1.4.

6.3.1.2. Masonry or Concrete Chimneys

1) Rectangular masonry or concrete chimneys not more than 12 m in height shall conform to Part 9 if they serve

a) appliances with a combined total rated heat output of 120 kW or less, or

b) fireplaces.

2) Masonry or concrete chimneys other than those described in Sentence (1) shall be designed and installed in conformance with the appropriate requirements in NFPA 211, “Chimneys, Fireplaces, Vents, and Solid-Fuel Burning Appliances.”

6.3.1.3. Metal Smoke Stacks

1) Single wall metal smoke stacks shall be designed and installed in conformance with NFPA 211, “Chimneys, Fireplaces, Vents, and Solid-Fuel Burning Appliances.”

6.3.1.4. Lightning Protection Systems

1) A lightning protection system, when provided, shall conform to CAN/CSA-B72-M, “Installation Code for Lightning Protection Systems.”

NC2010  2010-01-01 R1

1) A lightning protection system, when provided, shall conform to the requirements of the appropriate provincial or territorial legislation or, in the absence of such legislation, to CAN/CSA-B72-M, “Installation Code for Lightning Protection Systems.”

6.3.1.5. Access Ladders

1) Access ladders for chimneys, when provided, shall consist of steel or bronze rungs, built into the walls of the chimneys.

2) Rungs for external ladders shall begin at not less than 2.5 m from ground level.