A tale of two thermometers

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Just to give you an example, we can run our stove top at 650 and the flue temperature will be around 350 or maybe just above that. If the stove top is below 550 the flue is never over 350 and sometimes much lower. Only on reloads does the flue temperature rise up. Once it hits 500 we have the draft down and the cat turned on. If no cat stove, then you just turn the draft down. With the cat stove there can be a bigger difference between flue temperature and stove top.
 
BeGreen said:
Correct, the stove top is usually hotter, except when the stove is first warming up. I would expect to see around 500-700F on the stove top and 200-450 on the flue surface with that stove.
Click to expand...

I think we need to clairify greater.

The stove top SURFACE temp will be hotter than the flue SURFACE temp. If one has a probe thermo, the flue GAS temp will be higher than the stove SURFACE temp.

If you are using a flue surface temp gauge you are, in car tems, using a tach to measure speed. Meaning you are measuring one thing (the surface temp) to gauge something else (the gas temps). And then again you are using one thing (the flue thermo gauge for "overfire") to measure something else (are you overfiring the stove).


All numbers depend on how and what you are measuring, and with what instrument.

Shawn
 
"on the stove top" and "on the flue surface" is not clear?
 
BeGreen said:
"on the stove top" and "on the flue surface" is not clear?
Click to expand...

I wanted to clairify for any one who is new to burning that you need not only consider the temperature but also the type of thermo (surface or probe), and what it was designed for.

I think we know, but if someone were to read that your flue temp ( you know they will read it this way and skip the word surface) should be lower, and they actually have a probe thermo they would be confused and/or concerned. Just wanted to make it very clear to OP and whom ever else reads this thread.

Shawn
 
shawneyboy said:
BeGreen said:
"on the stove top" and "on the flue surface" is not clear?
Click to expand...

I wanted to clairify for any one who is new to burning that you need not only consider the temperature but also the type of thermo (surface or probe), and what it was designed for.

I think we know, but if someone were to read that your flue temp ( you know they will read it this way and skip the word surface) should be lower, and they actually have a probe thermo they would be confused and/or concerned. Just wanted to make it very clear to OP and whom ever else reads this thread.

Shawn
Click to expand...
Very good point Shawn.
 
No problem, it does look like the thermometers are identical. Personally I prefer a thermometer with just temperatures and no burn range scales.
 
BeGreen said:
No problem, it does look like the thermometers are identical. Personally I prefer a thermometer with just temperatures and no burn range scales.
Click to expand...

On the burn range issue I agree 100 percent. Or have something that states on the face that range is for say single wall stove pipe only, or something like that. It seems to me there are soooooooooooo many people that get thrown , see OP original post, because of the range.

Sorry if my "clarify greater" comment read wrong, you know how it is with forums, write it out with or without inflection, and it is read with the wrong inflection.

Shawn
 
I hear ya, really no problem at all. Just wanted to make sure I hadn't given misleading info or missed something critical. Your point is well taken. We see lots of people running their stove too cool because they are reading the burn ranges using a flue thermometer on the stovetop and not the actual temperature.

The situation is made worse by constantly misleading info like this which comes right from Rutland. The readings from a stove door vs stove top vs flue surface are going to be in very different ranges. If I tried to burn the T6 with stove top temps in their ideal "Burn Range" I would often have a sooty glass and very tiny fires. This stove likes to see 650-700F with every full loading and it is a long way from overfiring. That burn range might be ok for some Hearthstones, but is pretty conservative for the average modern stove.
 

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