Charlottetown's fire investigator has traced the start of the weekend fire at the Charlottetown Mall to the heating unit in the women's sauna at the Spa Total Fitness Centre.
The fire started Sunday, and led to the mall being shut down Monday. The mall reopened for normal hours Tuesday.
"I've classified it as accidental, with failure on the installation of the heating unit," said Winston Bryan, adding his investigation is complete.
The Spa occupies a lower level of the mall, and Bryan said smoke damage is extensive there.
"The smoke buildup was tremendous within the confines of that level. The bottom level itself sustained heavy smoke damage and water damage," said Bryan.
The Spa, along with its associated daycare, remains closed. Bryan said with the smoke damage he does not believe the daycare will be able to salvage many of its books and toys.
There was some limited smoke damage on the main level of the mall, particularly in the food court area.