A fire Tuesday morning caused about $20,000 in damages at Franklin Bronze.
The blaze, which occurred about 9:10 a.m., was caused by a malfunctioning furnace.
The fire was extinguished by Franklin Bronze employees before crews arrived on the scene, according to Tim Heller of the Franklin Fire Department.
Three people were treated at the scene for smoke inhalation, but no one was taken to a hospital.
Franklin and Sugarcreek police and Community Ambulance Service also responded to the call. The scene was cleared around 10 a.m.
Rocky Grove and Sandycreek volunteer fire departments were on standby.