If you use a gas furnace to warm your house, you may have wondered if there’s a chance the furnace could become a hazard. The simple answer is “yes,” because that’s true for any use of natural gas.
However, this isn’t a reason to panic or immediately think of switching to a different type of heater. The chance of your furnace becoming dangerous is small, and with precautions you can keep it to almost nothing. The modern gas furnace is built with safety features and made to high standards to make them safe for homes—they wouldn’t be allowed in homes at all if they were routinely dangerous.