Portable Heaters

It is critically important for companies to establish and follow safe guidelines for using portable heaters. Without them, portable heaters can become workplace fire hazards.

Prior to Operation

  • Ensure electronic flame sensors or pilot safety valves are in place.
  • Examine cords or electrical connections for damage.
  • Inspect for damage or fuel leakage following long-term storage.

Approved for the Environment

  • Place heaters on a non-combustible surface that extends four feet in front of the unit, unless approved otherwise by the manufacturer.
  • Remove all combustible materials near the unit.
  • Establish a three-foot safety perimeter around the heater.

Ventilation

  • Ensure there is adequate ventilation in the area where you plan to use the heater.
  • Provide mechanical ventilation when the natural supply of fresh air is inadequate.
  • Verify the unit does not deplete oxygen in the area.
  • If you’re using the heater in an enclosed space, use an appropriate carbon monoxide detector.

Fire Prevention

  • Maintain a fire extinguisher nearby.
  • Verify that the heating unit is off and cool before you refuel it.
  • Never refuel indoors or within 50 feet of a building.
  • Turn off portable heaters in unoccupied spaces.

Accident & Injury Prevention

  • Develop a plan for portable heater use.
  • Make sure to communicate sound safety procedures for using portable heaters.
  • Consider the jobsite’s conditions and requirements before selecting a portable heater.
  • Make sure all workers know how to use portable heaters safely.
  • Always follow the manufacturer’s specifications.
  • Reference OSHA’s construction standard for temporary heating devices Subpart F, 1926.154.

Download a printable PDF and recording form here.

Carbon Monoxide Hazards

Carbon monoxide poisoning is the leading cause of poison-related death in the United States and is responsible for approximately 450 deaths and 20,000 nonfatal injuries every year. Carbon monoxide is referred to as the silent killer because it’s a tasteless, colorless, odorless

Carbon monoxide blocks the absorption of oxygen into the bloodstream and poisons the red blood cells so they cannot carry oxygen. If tissues and organs don’t receive oxygen, they stop functioning.

In construction, the major source of carbon monoxide is engine exhaust. Gasoline, propane and diesel engines all release carbon monoxide. Some forms of welding and heaters can also produce carbon monoxide.

Common Signs of Overexposure to Carbon Monoxide

  • Headache.
  • Nausea.
  • Weakness.
  • Dizziness.
  • Loss of consciousness.
  • Death.

Sources of Exposure

  • Portable heaters.
  • Portable generators.
  • Concrete saws.
  • Compressors.

Control Measures

  • Conduct a workplace survey to identify all potential sources of carbon monoxide exposure.
  • Use equipment in a well-ventilated area, never in an enclosed area.
  • Inspect equipment prior to use.
  • When you’re using gasoline-powered engines or tools outside of a building, don’t place them near air intakes.
  • Limit running time, and don’t let engines idle.
  • Provide employees with small, personal carbon monoxide detectors with audible alarms to wear or install large, mounted carbon monoxide monitors in work spaces.

Download a printable PDF and recording form here.

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