On the other hand, are these machines more prone to problems and need of repairs than a simpler furnace? That could wipe everything out. Plus it might be beyond my abilities to repair. The old furnace (see other thread) I could do most maintenance. I was even able to solve a problem that stumped a pro many years ago. (Not his fault...it just didn't act up when he came.)
I know the pros of the super efficient furnaces. What are the cons? The ones being considered are Carrier Performance Series. What are HVAC techs putting in their own homes?