Bed Bug Task Force Ltd. pleaded guilty Tuesday to one violation of the Alberta Fire Code for the blaze at the Royal Scot condominiums.
According to court documents, the company was exterminating bed bugs using a propane heater in a suite on the top floor of the 66-unit building.
Investigators said the way the company was carrying out the job violated regulations and likely contributed to the ignition and the rapid spread of the fire.
Two women and two children were injured during the fire and two firefighters were injured by falling debris.
Investigators estimated the fire caused $3.5 million in damages.
“The Royal Scot fire was preventable, posing needless risk to the public and emergency responders,” said Russell Croome, deputy fire chief of public safety.
“We rarely lay charges but took this action to hold those responsible accountable for failing to take safety precautions.”