High levels of carbon monoxide were detected inside a home where two people were found unconscious Wednesday morning.
The couple's daughter found them inside their home on the 10000 block of Parkwood Drive in Kensington, Maryland, at 10:30 a.m. and called 911. She performed CPR with instruction from the emergency operator as paramedics were dispatched to the home.
Both were unconscious when they were pulled from the home by firefighters, Montgomery County Fire and Rescue Service spokesman Pete Piringer said.
The husband has life-threatening injuries. His wife and their daughter are also hospitalized in less serious condition.
Firefighters at the scene took a reading for carbon monoxide and found high levels inside the home.
"The initial call was for a medical emergency," Piringer said. "When we arrived the crews did detect a high level of carbon monoxide."
The source of the CO was the furnace in the basement, where the couple was sleeping while the home is being renovated. Investigators are looking into whether the renovations factored in the CO poisoning.
Neighbors said the couple recently moved into the house.
