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condensing concentric 2/4" vent for Rinnai RUR199iN

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waldemar kawalko
waldemar kawalko Member Posts: 14
in Domestic Hot Water
I have chimney flue 47' long and I need condensing concentric 2/4" vent for Rinnai RUR199iN
is there flex condensing concentric 2/4" vent ?

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  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,002
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    I've never heard of flex concentric. Can you get your fresh air from somewhere else?


    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab

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