Electrical and HVAC Fires in Commercial Buildings
Roughly 9% of fires happen when an HVAC system malfunctions. This includes central heating systems, as well as water heaters, space heaters, and other appliances.
Heating systems should be regularly inspected, especially during winter when they are used most heavily. And always ensure flammable materials are kept well away from heat sources. Areas where the main HVAC system is housed, as well as any water heaters or storage rooms, should be outfitted with smoke alarms and should also house a fire extinguisher.
About 7% of fires are linked to an electrical system malfunction, often due to problems with wiring in the building. These fires are more likely to occur in older buildings with questionable wiring. Make sure your building is regularly inspected and that you keep fire extinguishers on each level.
Source: Smoke Guard Online