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firebrick rating

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All I could get locally were 2300 degree rated firebricks. According to a number of the things stated about RMH materials this should be fine. Yet I recall Ernie or Ericka talking (I think in one of the DVDs) about getting temperatures above that; especially in a unit build like I'm thinking (insulated firebrick burn tunnel and riser surrounded by perlite-clay).

Any thoughts? What are typical burn temps? Am I fine or am I going to melt the bricks? Should I mod the design to keep it cooler?

Personally I'm thinking of installing a pyrometer (cheap insurance) and going easy on the hedgewood.
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Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
Jay Hunter
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I got 2300's from Kimball. I could have gotten higher temps from them but they didn't have any in stock locally and my schedule didn't allow for the time to ship in different ones.

Oh btw, we contacted several KC local places selling 'firebrick' all of which would swear up and down they had what we wanted but they really had no clue what we were asking for. The only way to figure out what they actually were selling was getting the brick weight (7-9# no go) (1-2# good). Kimball was the exception (and the only one with insulative firebricks) The local guy there was very helpful and knowledgeable.

Still hoping for detailed thoughts on the temps thing.
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