Hi Im New here...

[bendzuch]

this is my second season now.
i have Lennox Montlake™ 230 fireplace insert with flex stainless steel liner DW.
and i have offset box on top on my insert for liner and there i install probe for temperature monitoring so i can see the flue temperature. then on top on shelf i have magnetic thermometer too...
im new to that stuff so please help me.
what temperature i should have on top on my insert and inside in flue collar? (That offset box)
now im running on 400F-550F on inside and 300F-350F on magnetic thermometer..
thank you.

 

[begreen]

Predicting temps on an insert is hard but it sounds like you are dialed in nicely and about right.

 

[bendzuch]

what max F i should run inside temperature to be safe?

 

[begreen]

Max inside flue would be around 800F. It will take more, but shouldn't see more than that unless just briefly.

 

[bendzuch]

and one more stupid question...
what is minimum inside F* temperature?
i just sweep my chimney after first full 1cord burned and i get about 1 cop of suds. the chimney is about 30Ft long

 

[Woody Stover]

what max F i should run inside temperature to be safe?

For the probe in the flue? I don't have a probe but I'm guessing I run it up around 1000 or better when burning in a new load. Once I cut the air and cruise it, probably closer to 300-400. True flue temps are taken with the probe a little further from the flue exit, though. Sounds like yours is pretty close to the exit. Mine is a surface meter lying on top of the stainless tee snout about 6" from the flue exit.

 

[bendzuch]

The probe is about 5"-6" from collar in offset box.