Burner orfice size?


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Old 11-20-13, 05:14 PM
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Burner orfice size?

I'm trying to understand how burner orfice size relates to furnace output. I have an older LP gas furnace in my garage. The name plate states 80,000 BTU with 64,000 BTU bonnet capacity. Does this mean it's an 80k furnace or a 64k? Also, there are 3 burners and the jet size is #55. According to a chart I found online, that jet size would be for 18,800 BTU's. Does each burner put out the rated BTU or is the BTU rating divided by the number of burners and the combination of all burners equal the BTU output?
Anybody have the time to explain this to me? Thanks
Mike in SD
 
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Old 11-21-13, 05:16 PM
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You size by input. Input is divided by the number of burners.
 
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Old 11-22-13, 10:53 AM
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mbk3, Thanks for the information. That makes sense to me. The furnace would seem to be underfired but it's working fine in my garage. I'll leave it alone.
Mike in SD
 
 

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