On Friday, January 30, 2015 at 5:53:07 AM UTC-5, micky wrote:
On Wed, 28 Jan 2015 05:32:36 -0800 (PST), trader_4
wrote:

On Tuesday, January 27, 2015 at 11:43:24 PM UTC-5, micky wrote:
On Tue, 27 Jan 2015 14:45:26 -0800 (PST), wrote:

I have a 2001 Burnham V8(oil burner hot water) with energy
efficiency between 78-80%. Is that good for its age?

I know more about oil than gas.

When I divide the output BTU's*** by the input BTU's on my 1979 Carreir
oil furnace (hot air), I get about 80%. ***As listed in the owner's
manual that came with the furnace, and is online too.

When I was shopping for a new furnace a couple years ago, the efficiency
of all of them** was about 82%. (iirc but at any rate, little higher
than my furnace rating.)

People here at the time did not believe me that the efficiency has gone
up so little.


People didn't believe you because you were wrong. I replaced my nat gas
furnace back in 2010 with a 93%.

Gas furnaces have nothing to do with oil furnaces. You must be
misrecalling the discussion years ago, which was also about oil
furnaces.


No, I was just thinking in the context of this current thread,
which started with a question about the efficiency of gas furnaces.
I missed the segue into oil furnaces. But even so, there are
condensing oil furnaces that are as high as 95%, Adams Manufacturing
has one for example, though they may not be mainstream or practical.
IDK what they cost.