What type of space heaters are allowed overnight at the construction site?

The correct type of space heaters allowed overnight at a construction site are portable fueled heaters, which typically refer to heaters designed to operate using fuels such as propane or natural gas. These heaters are carefully regulated and must be used according to safety protocols to minimize fire hazards, particularly in construction environments where combustible materials may be present.

Portable fueled heaters are often chosen for their efficiency in outdoor and temporary heating situations, making them suitable for construction sites. They provide adequate heat and can be positioned strategically where needed, while being built with safety features to prevent accidents when used correctly.

On the other hand, options like regular space heaters and electric heaters may not be suitable for overnight use due to safety regulations and the potential for overheating or electrical fires. Oil-filled heaters, while typically safe, may also present issues such as spilling or being knocked over in a construction context. Therefore, the focus on using portable fueled heaters creates the right balance between being effective and ensuring safety within the unique environment of a construction site.