If it's 15 years old and still going, pretty good. Is it a furnace or AC unit or both?
Either way, you could expect 5 mores years of service with normal maintenance. You may want to plan around that because the EPA keeps making them more expensive and less reliable. I'm not up to speed on the latest. I do know EPA messed up water heaters last year.
EPA did not mess up water heaters last year.
The heaters are exactly the same as before. The insulation is thicker.
To distinguish further, the labeling was changed to allow instant recognition however the content of the labeling was virtually the same
Ons primary problem is that export shipment quantities were reduced because less heaters could be loaded into a 40’ container