Firefighters tackled a flat fire on Laurel Grove in Penge.
Half of a bedsit flat on the ground floor of a three-storey residential building was damaged by fire. Firefighters wearing breathing apparatus rescued a man who was taken to hospital by London Ambulance Service crews after suffering from smoke inhalation.
The fire is believed to have been accidental and involved a table fan placed on the bed.
A London Fire Brigade spokesperson said: "It's important to make sure electrical devices and appliances are always used on hard flat surfaces where heat can dissipate.
"Using them on a fabric surface can result in a lack of airflow and can cause them to overheat."
The Brigade was called at 1120 and the fire was under control at 1205. Three fire engines and around 15 firefighters from Forest Hill, Woodside and West Norwood were in attendance.