Space Heaters Pose Risks to Facilities

Keeping the inside temperature of a workplace comfortable for each employee is difficult, especially in old buildings during a Minnesota winter. Space heaters seem like a natural solution to the problem, but they are a significant fire and electrical hazard, and most are not energy efficient. The use of unapproved space heaters in any member-managed space should not be allowed.

Portable space heaters can affect a building’s heating, ventilation and air conditioning system and create issues of discomfort for others as the system works overtime to accommodate the added heat caused by these appliances. If operated in a zone with a thermostat, heat may not be called for other work zones, creating a hot and cold imbalance.

For space heaters to be allowed in the workplace, consider the following best practices:

• Do not allow heaters with exposed or open electric heating elements. Portable ceramic, oil-filled or infrared space heaters may be a better option.
• Heaters should be certified by a nationally recognized testing laboratory such as Underwriters Laboratories Inc. (UL). Look for the testing laboratory symbol on the bottom or back of units to find if it is certified.
• Space heaters should not exceed 1,500 watts. Due to excessive electrical current demands of these devices, it is important not to overload electrical outlets, which may adversely affect others in the area.
• Space heaters must not be plugged into extension cords or power strips. Heaters should be plugged directly into a permanent wall outlet.
• Space heaters should have a safety tip-over switch that automatically turns a unit off if it is knocked over or tilted.
• A clearance of at least 3 feet from combustible materials (paper, wood, carpet, cloth, etc.) should be maintained on all sides of the unit.
• Heaters should not be left unattended, and they should be monitored periodically while in use.
• Heaters must be turned off when employees leave their workspace.
• Heaters should only be used as directed by the manufacturer.

Consideration should be given to incorporating space heater rules in an overall appliances in the workplace policy. Any approval rules or requirements should be consistently enforced.