On 08/07/2017 11:14 PM, Iggy wrote:
Sorry but, an 80% unit used to be half the cost of a super-high
efficiency
unit. Thousands of dollars may not matter to you, but to others it
does. And
no, the efficiency won't pay for itself in most of the world and you'd
only
break-even upon a decade of use.

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High-efficiency furnaces are notoriously unreliable after they're about
8 years old. Any money you save on fuel the first 8 years, you'll spend
on repairs the second.

After several no-heat breakdowns (always happened at the worst possible
times), I finally put in 25,000 BTU of backup electric baseboard heat.