Using temporary heaters on construction sites keeps workers warm, protects materials and ensures processes like concrete curing go smoothly during cold-weather projects. However, this equipment can create unique safety hazards. Properly handling these machines is essential for avoiding potentially dangerous accidents and maintaining a safe work environment.
With careful planning and adherence to safety practices, contractors can harness the benefits of temporary heating while protecting everyone on-site.
Why Temporary Heating Can Be Dangerous
There are various risks that make it crucial for contractors to follow strict safety guidelines, provide proper training and use heaters that suit jobsite conditions. These risks, primarily associated with fire and toxic gas exposure, include:
- Carbon monoxide (CO) poisoning: When fuel-burning heaters are operated in poorly ventilated spaces, CO can accumulate quickly, leading to dizziness or nausea, among other side effects.
- Fire and explosion hazards: The high heat these machines emit can ignite flammable materials. Gas or fuel leaks can also cause explosions if ignited by a spark or open flame.
- Burn injuries: Heaters can become extremely hot, posing a burn risk to anyone accidentally coming in contact with them. This is more likely to happen in tight or busy spaces.
- Materials overheating: Excessive heat can cause some materials to warp, overheat or become unstable. For example, concrete that dries too quickly can develop weak points or cracks, reducing durability.
- Trip and fall hazards: In busy or crowded areas, workers can trip over cables or hoses, increasing the risk of falls and injuries.
- Electric shock: Faulty or exposed wiring and potentially wet conditions can create electrical hazards.
6 Safety Tips for Using Temporary Heating
Here are the essential safety tips to help contractors and crews use temporary heating effectively and safely.
1. Choose the Right Heater Type
One of the most important safety steps to take is to select the right heater for your application. Refer to the manufacturer’s guidelines for specific information on safe operation, and consider the work area’s ventilation level. These are some of the most common heaters for construction sites:
- Direct-fired heaters: These heaters burn fuel to produce heat and are best for outdoor use or in highly ventilated spaces. They emit combustion gases, which can be dangerous in confined areas.
- Indirect-fired heaters: These heaters burn fuel in a sealed chamber, venting hot air into the space separately from combustion gases. These heaters can be used indoors or outdoors — if used inside, they must be vented to the outside.
- Self-contained heaters: These heaters are ideal for remote projects, as they can use electricity, oil, gas or diesel for targeted heating.
2. Ensure Proper Ventilation
Combustion heaters, such as kerosene or propane models, can release CO, a hazardous, colorless and odorless gas. Improper installation can lead to CO poisoning and oxygen depletion. It can also pose a fire hazard, as trapping flammable gases and fumes creates a higher risk of explosion or fire.
Use CO detectors in enclosed spaces where heaters are in use and follow OSHA recommendations for acceptable ventilation. Exhaust fans or mechanical ventilation help to improve circulation and move fresh air into the space while removing harmful gases. It’s crucial to continuously verify that the heated area is adequately ventilated to avoid CO buildup, especially in airtight spaces.
Temporary heaters can also reduce overall air quality in enclosed spaces, as they release dust, fumes or other airborne particles. Prolonged exposure without protective equipment can cause respiratory issues, especially for employees with existing conditions like asthma.
3. Check Heater Placement and Stability
Place heaters on a flat, stable surface away from flammable materials like fuel supplies, insulation and wood. The National Fire Protection Association recommends a distance of 3 feet from these items. Additionally, keep heaters at a safe distance from ceilings, walls and other combustible items to reduce the risk of fire.
Ensure all power cords, fuel lines and hoses are routed to minimize tripping hazards. Secure these cords and lines to prevent accidental disconnection. Use cord covers or mats to protect cables in high-traffic areas and reduce tripping risks.
4. Inspect and Maintain Equipment Regularly
Conduct a thorough inspection of each heater before use, checking for signs of wear such as leaks, damaged electrical components and cracked hoses. Faulty parts should be replaced immediately — never use damaged equipment, as doing so can lead to fires, gas leaks or equipment failure. Keep a maintenance log for each machine to rack inspections, repairs and part replacements.
Renting temporary heating equipment provides many benefits, including maintenance and repairs from your rental partner if needed. If an issue arises, contact your rental partner immediately. They can address the problem promptly to help keep your project on track.
5. Use Safe Handling Practices
Always use approved containers for storing fuel and label them clearly to avoid accidental misuse and confusion. Keep fuel away from heaters and ensure liquid-fuel heaters are turned off and cooled down before refilling to avoid the risk of ignition.
High temperatures can cause overheating and damage tools, concrete or materials. Use temperature gauges or thermostats to keep track of the heating output. Avoid raising the temperature too quickly, as this can cause thermal stress on materials.
6. Implement Fire Safety Measures
Ensure all personnel understand the fire evacuation plan and emergency shutdown procedures for each type of heater. Always keep Class B or C fire extinguishers, rated for flammable materials, within reach of heaters. Never leave heaters unattended, especially overnight. Turn off heaters when they’re not being actively supervised.
Post warning signs near heaters and fuel storage areas. Clearly label areas with limited access to prevent accidental interference. Additionally, all workers should be continuously trained on safe heater use.
Construction Heating Safety Guidelines
OSHA has stringent requirements for temporary heat on construction sites to ensure worker safety. These guidelines cover:
- Heating devices that comply with 29 CFR 1926. 154.
- CO exposure limits under 29 CFR 1910. 1000.
- Electrical safety standards under 29 CFR 1926. 403.
- Safety training and hazard communication per 29 CFR 1926. 21.
Choose Quality Heating Solutions From Herc Rentals
Temporary heating is a valuable construction tool, helping keep projects on track and promoting safe material handling in colder conditions. However, improper heating practices can create serious risks. Contractors can help workers and the project site stay safe by prioritizing proper heater operation and implementing clear safety measures.
Herc Rentals offers cost-effective industrial heater rentals to help you keep projects moving in the winter. From electrical heaters to diesel options and other climate control equipment, our team can help you find equipment that suits your project’s unique needs. Explore our selection of heaters today, or find a branch near you to get started.
