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  1. #1
    Join Date
    Nov 2012
    Location
    Slidell Louisiana
    Posts
    5

    Conversion from BTU to Tons. Round up or round down

    I notice that many 3 ton systems are 34000 btu while a 33000 btu unit is listed as 2.5.

    I need to verify (for a larger rebate) that 40,000 btu is actually 3.5 tons NOT 3.0

    Is there an "authoritative" chart listing where the crossover is from one size to the next?

  2. #2
    Join Date
    Mar 2003
    Posts
    7,326
    there are matchup sheets available from the manufacturer, vendor, and contractor to show design sensible and latent energy for a specific combination. ask for that.

  3. #3
    Join Date
    Nov 2012
    Location
    Slidell Louisiana
    Posts
    5
    Thanks, but it was a simple question, "is there a chart?" I scoured everywhere before posting here, and found nothing. I'm not a homeowner working on my own system. I train technicians and QA their work. Some of the folks where I work process Energy Starฎ rebates on new central systems. They would like a chart so that they don't have to keep calling me in the field to ask. I was trying to help them. Our approved contractors certainly don't need me calling for anything sensible. Thanks again.

  4. #4
    Join Date
    Jun 2009
    Location
    Ontario, Canada
    Posts
    1,042
    1 pk = 9000 btu = 3/4 ton
    1 ton = 12000 btu

    34mbh is 2.5 tons
    Parts Changer Extraordinaire
    ------------------------------------------------------
    Have tools and gauges, will travel.

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