What should be monitored to maintain safe operation of a gas furnace?

Monitoring gas pressure and carbon monoxide levels is essential for the safe operation of a gas furnace. Gas pressure must be maintained within specific limits to ensure the furnace operates efficiently and safely. If the pressure is too low, the furnace may not ignite or operate properly. If it's too high, it can lead to equipment damage or unsafe operating conditions, including the risk of gas leaks.

Carbon monoxide levels are crucial to monitor as well. This colorless, odorless gas can be a byproduct of incomplete combustion. High levels of carbon monoxide in the home can pose serious health risks, including poisoning and, in severe cases, can be fatal. Properly functioning ventilation, combustion air supply, and regular maintenance can help to prevent carbon monoxide buildup, but ongoing monitoring is necessary to ensure safety.

While energy bills, temperature fluctuations, and filter appearances can provide insights into furnace performance or efficiency, they do not directly relate to the immediate safety concerns associated with operating a gas furnace. Therefore, focusing on gas pressure and carbon monoxide levels is vital for ensuring a safe and effective heating environment.