Three people escaped injury early Saturday when a fire damaged their home in West Ashley’s Air Harbor subdivision.

The Charleston Fire Department was dispatched to a home on Boeing Avenue at 5:49 a.m., said Mark Ruppel, fire department spokesman.

One of the residents was awakened by the smell of smoke, Ruppel said. The smoke was coming from an air-conditioning unit. When firefighters arrived, there was heavy smoke showing, Damage was contained to the back of the house, but the electricity had to be turned off so the house was uninhabitable, Ruppel said.

Volunteers from the American Red Cross responded and provided assistance to 2 adults and 1 teenager. The Red Cross provided the family of three with food and with comfort kits, which contained personal hygiene items. The Red Cross also provided referrals to partner agencies to assist with long-term recovery.

There were no injuries. The St. Andrews Fire Department provided mutual aid.

The cause of the fire was not determined, Ruppel said. It was not thought to have been suspicious.