Fire crews from Banbridge responded to a call at 1am last Thursday morning to a mid terrace house at Kenlis Street in the town.
Firefighters wearing breathing apparatus used a hosereel jet and a covering jet to put out a fire in the kitchen.
A 70-year-old man suffered mild smoke inhalation. Fire crews had to ventilate the smoke from the premises and the cause of the fire appears to have been accidental.
Meanwhile a car was set on fire in an apparent arson attack at Ardaghy Road in the Kilcoo area outside Rathfriland also on Thursday.
Firefighters used a hosereel jet to put out the fire at around 4.40am.
Fire crews from Rathfriland and Newcastle stations attended the incident.