While Upper Arlington fire officials have reached a conclusion on the cause of a fire that blazed through a $1.3 million Tremont Road house last week, the incident is still officially listed as "under investigation."

While Upper Arlington fire officials have reached a conclusion on the cause of a fire that blazed through a $1.3 million Tremont Road house last week, the incident is still officially listed as "under investigation."

Dan Kochensparger , the fire division's public information officer said, that although fire prevention specialists completed their cause and origin investigation in the first couple of days after the Aug. 16 blaze, they will not make public any conclusions until the homeowner's insurance company decides whether to send technical specialists to conduct a separate examination.

Crews from the UA fire division responded at 12:53 p.m. Aug. 16 to calls of a fire at 2528 Tremont Road, just south of Lane Avenue. About 40 firefighters and 16 fire and EMS apparatus from Columbus, Grandview Heights and Norwich Township provided assistance to Upper Arlington's 13 firefighting personnel at the fire, Kochensparger said. Crews had the fire contained by about 2:45 p.m.

"We were dispatched to what was reported as a fire in the attic, and when the first unit got there, there was smoke coming from the attic but no fire showing from the outside, at first," Kochensparger said.

Upper Arlington firefighters entered the house and tried to access the fire, but had trouble making it up to what turned out to be two separate attics in the structure.

"By the time we were able to get in there, the fire had broken through to the outside," Kochensparger said. "At that point, oxygen begins to feed the fire, and it was moving at such a rate that we had to evacuate our firefighters from the building and continue to fight from outside."

No one was in the building when fire crews arrived, he added, nor did there appear to be any danger of the fire spreading to neighboring properties. Homeowner Peter Koeppel had been working with another man on the building's exterior when they noticed smoke and called 911.

Two Columbus firefighters were treated for heat exhaustion at the scene, as well as one Upper Arlington firefighter.

Kochensparger said the men were given water at the scene and required no additional treatment.

The fire division has made a preliminary damage estimate, to both the house and its contents, of $1 million. That figure will be adjusted up or down as calculated by the insurance adjustor, Kochensparger said.