Temporary heaters can be fuelled by:
Electric heaters are not as common as fuel or gas-fired heaters. They should be used where heated air must be free of combustion byproducts (like carbon monoxide and carbon dioxide). An electric heater is useful in a closed space where the supply of fresh air is limited.
Liquid fuels such as oil and kerosene are another good source of heat. They require a large storage tank on-site for a constant supply of fuel to refill the heaters.
Some liquid-fuelled heaters release exhaust fumes with an oily smell that can be irritating for workers. It’s possible to vent the heater outdoors and produce a large volume of heated air free of combustion byproducts. This is sometimes done to heat the air over a new concrete placement in winter.
Propane or natural gas heaters also provide a supply of heat. They are lightweight and easy to transport.
Both gases are highly flammable and explosive. Use the necessary precautions when handling, storing and using these gases. [Refer to Safety Talk No. 10 on propane.]
Propane is heavier than air. Leaking gas will settle in low-lying areas such as basements and trenches. This can lead to asphyxiation and explosion.
Keep propane containers and tanks secured and upright at all times.
[Instructor to inspect heaters in use on site, connections to compressed gas containers, and storage arrangements for the containers.]
In New Brunswick, the law on portable compressed gas containers can be found in General Regulation 91-191 under the Occupational Health and Safety (OHS) Act, sections 74 – 79.
The law on air contaminants is in General Regulation 91-191 under the Occupational Health and Safety (OHS) Act, sections 24 and 25.