HVAC serial number lookup
Use this HVAC serial number lookup to find the age of a furnace, air conditioner or heat pump. On a furnace the data plate is usually inside the front panel, near the blower or the burners. On an outdoor air conditioner or heat pump it is on the side or back of the cabinet, often beside the electrical panel.
Where do I find the serial number?
Look for a printed or stamped label that lists the model and serial numbers. On a furnace it is usually inside the front panel. On an outdoor AC or heat pump it is on the side or back of the cabinet.