furnace maintenance 5

https://ace-wiki.win/index.php/Key_Considerations_for_Commercial_HVAC_Systems

Before the first big chill, I always call a pro to inspect the furnace. They check the heat exchanger for cracks, clean the burners, and replace the filter. It's a small investment to avoid waking up to a freezing house or a dangerous carbon monoxide leak in the dead of winter.