Conversion from BTU to Tons. Round up or round down

[Rosserver]

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?

[flange]

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.

[Rosserver]

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 Star® 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.

[blitz]

1 pk = 9000 btu = 3/4 ton
1 ton = 12000 btu

34mbh is 2.5 tons