Hall County firefighters are investigating a Monday blaze that injured one person.

A house in the 2800 block of Athens Highway, just south of Priest Circle, was about 25 percent involved in flames when firefighters arrived about noon.

The house was about 1,200 to 1,300 square feet in size.

A man had to be treated on the scene for smoke inhalation. He later was flown by helicopter to Grady Memorial Hospital in Atlanta.

Emergency workers "discovered some respiratory burns and ... any time the respiratory system is involved, that’s pretty much a trip to Grady to get checked out," Hall County Fire Chief David Kimbrell said said.

No other injuries were reported.

Two adults and two children live in the home, but he was the only one in the house at the time.

Fire officials are still trying to determine the cause.

"The tenants were having some problems with the furnace, but we’re not ready to call it that (as the cause) yet," Kimbrell said. "But we’re leaning that way."

Kimbrell said firefighters are on high alert this week because of frigid weather, with temperatures dipping into the teens and 20s.

Fire emergencies tend to occur frequently in cold weather, as conditions are drier than normal and residents turn to different sources of heating their home.

Temperatures are expected to remain chilly through Wednesday with a chance of rain moving in Thursday.