Are the fumes emitted from an oil-burning furnace dangerous to humans? Yes 90% No 9% Get Free Quotes Today! Question: Are the fumes emitted from an oil-burning furnace dangerous to humans? Top Answer (90% of 11 votes): Yes. Answer: Yes Explanation: Carbon monoxide Arizona's Best Heating & AC, Inc. Answer: No Explanation: But they make a mess HVAC and More Answer: Yes Explanation: The fumes have Carbon Dioxide in them. Kohler Heating and Air Conditioning Get Free Quotes Today! Find Local Pros Free Forced Air Furnace Repair Cost Estimates Related Questions Can a gas furnace be converted to an electric furnace?Top answer: Never An electric furnace is more energy efficient than a gas furnace.Top answer: False Should a furnace fan be running at all times?Top answer: No Can I use a regular air filter for my furnace filter?Top answer: Yes Would you typically recommend buying a furnace air purifier?Top answer: Always