What must a technician check before replacing a gas furnace?

Before replacing a gas furnace, it is crucial for a technician to check the existing ductwork and gas supply lines. This assessment is important because the ductwork must be able to accommodate the airflow requirements of the new furnace. If the ductwork is incorrectly sized or in poor condition, it can lead to inefficient heating, increased energy costs, and compromised comfort levels in the building.

Additionally, verifying the condition and adequacy of the gas supply lines ensures that the new furnace will operate safely and efficiently. Insufficient gas supply can lead to improper combustion, reduced efficiency, and potential safety hazards. Ensuring that both the ductwork and gas supply lines are suitable is a fundamental step in the replacement process to guarantee that the new furnace will function effectively and reliably in the existing system.

Other considerations, such as thermostat compatibility, age of the furnace, and brand of the replacement unit, are also relevant when replacing a furnace but are secondary to ensuring that the infrastructure (ductwork and gas lines) is properly set up to support the new equipment installed.