On Thu, 19 Dec 2013 22:32:10 -0500, micky
wrote:

On Thu, 19 Dec 2013 22:22:00 -0500, Ed Pawlowski wrote:

On 12/19/2013 2:17 AM, gregz wrote:
Today's furnace specify btu. Is that input or output ?

Greg


Input. Figure the output by multiplying by the efficienct rating.

Is that true for oil furnace, too?

Yes.

Or maybe the question is, Was that true for oil furnaces 35 years ago,
too?

Yes. It was stated as such, on mine. As others have stated, it can't
be anything else. There are too many variables to state the heat
output.