Several fire departments respond to Conscious Cup Coffee Roasters, 5005 Northwest Highway in Crystal Lake, for a fire in a commercial appliance that caused heavy smoke in the business Thursday evening. | Photo: Mike Cujo Palazzo

The Conscious Cup Coffee Roasters shop in Crystal Lake is temporarily closed after a fire started inside and caused smoke damage to the business Thursday evening.

The Crystal Lake Fire Rescue Department responded around 10:50 p.m. Thursday to a report of a structure fire at Conscious Cup Coffee Roasters, 5005 Northwest Highway in Crystal Lake.

Crystal Lake Fire Chief Paul DeRaedt said a passerby noticed flames coming from the roof above the business and called 911.

An employee was in the building roasting coffee at the time the fire started.

The fire was discovered to be in the exhaust ductwork of a commercial coffee roaster, DeRaedt said.

The employee had used two fire extinguishers on the fire before the fire department arrived.

Firefighters arrived in six minutes and found a significant amount of smoke in the business, DeRaedt said.

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The fire was confined to the ductwork of the roaster and was quickly extinguished with less than 50 gallons of water.

DeRaedt said the cause of the fire appears to be related to a buildup of roasting material in the ductwork lining that ignited.

The business sustained smoke damage and will remain closed until repairs are made.

The McHenry County Department of Health will also need to inspect the business before it reopens.

“The Crystal Lake shop will be closed tomorrow and we’ll keep you posted about the weekend,” the business said in a social media post.

DeRaedt said the damage is estimated at $20,000. The building is not equipped with a fire alarm or fire sprinkler system.

There were no injuries to anyone. Several area fire departments assisted Crystal Lake at the scene.

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The incident is under investigation by Crystal Lake Fire Rescue investigators.