On 24 Jun 2012 20:42:20 GMT, Winston wrote:

On Sun, 24 Jun 2012 15:01:42 -0400, Jim Wilkins wrote:

"Winston" wrote in message
...

(...)

Perhaps I'll put an IR photosensor aimed at the burner. Or a
thermocouple nearby. Haven't decided.

--Winston

I'd put a thermocouple in the flue and capture both timing and heat
loss.

Yup. That flue does get pretty hot.

Probably couldn't hurt to replace it with an insulated flue.

Mine's plastic. The HVAC unit is a Carrier Infinity and is 96%
efficient. The output feels like it's maybe 120F.

--
Always bear in mind that your own resolution to
succeed is more important than any one thing.
-- Abraham Lincoln