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What Does Red-Tagging Mean? A Guide to Fuel-Burning Appliance Safety

2024-12-03

As temperatures drop, we rely on our heating systems to stay warm and cozy. But what happens when your heating system is deemed unsafe? That’s where red-tagging comes in—a term no homeowner wants to encounter, but one that’s crucial for safety.

Let’s break down what red-tagging means, why it happens, and how it plays a vital role in protecting your home from hazards like carbon monoxide poisoning.

What is Red-Tagging?

Red-tagging occurs when a heating technician or gas inspector identifies a fuel-burning appliance (such as a furnace, water heater, or boiler) as unsafe to operate.

A red tag is placed on the equipment to indicate that it should not be used until all necessary repairs or replacements are completed.

Types of Red Tags:

Why Are Appliances Red-Tagged?

Red-tagging typically occurs for the following reasons:

  1. Carbon Monoxide Risks: Cracked heat exchangers or malfunctioning burners can release carbon monoxide (CO), a colourless, odourless gas that’s highly dangerous.
  2. Old or Damaged Venting Systems: Corroded or blocked venting systems can leak harmful gases indoors.
  3. Gas Leaks or Improper Installations: Gas leaks or incorrectly set up appliances can pose fire or explosion risks.

What to Do If Your Appliance is Red-Tagged

If a technician red-tags your appliance:


By addressing safety concerns, maintaining your heating system, and ensuring proper venting, you can enjoy warmth and peace of mind throughout the winter season. Contact us today if you have questions about red-tagging or heating safety. We’re here to help keep your home safe and warm!