What is the tonnage of a carrier furnace model number 58gp100-2

Question edited for clarity, FULL 'make model (what it is)'.

Ascertaining the date is in the link and done from Serial Number. Tonnage is only on AC Units, furnaces are graded by BTU (British Thermal Units), and that is also on the serial label.

How To Read a Coleman Serial Number - HVACpartstore

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Coleman furnace age can be determined from the serial number usually located on the data plate. There are 4 different styles of serial numbers to determine ...

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The model number on the condensor tells you. Its always divisable by 6. So the number will be towards the end of your model number and be 6, 12, 18, 24, 30, 36, 42, 48, 60, or 72. Split system condensors stop at 5 tons or 72. If this doesn't help repost with the model number and I can easily tell you.

Look for your model number on your condensor, outdoor unit. Your tonnage will be towards the end of it and divisable by 6. I.E. 36=3tons or 42=3.5tons. Ac units are messured by the half ton. If you have a split system I.E. heater inside and ac outside your system will be 1 - 5 tons. If this doesn't help post your model and serial number. I can then give you tonnage, age, so forth.

This is a 3 and 1/2 ton unit.
The 042 in the model number is the tonnage of your carrier unit.
AC tonnage is based on 12,000 btu per ton.
12,000.....1 ton
18,000.....1 and 1/2 ton
24,000.....2 ton
30,000.....2 and 1/2 ton
36,000.....3 ton
42,000.....3 and 1/2 ton
48,000.....4 ton
60,000.....5 ton.
There is no 4 and 1/2 ton unit.

Brand: CARRIER Manufacturer: CARRIER CORP SYRACUSE Model Number: 38ARZ008(5/6)0 Condenser Type: air-cooled Coil Model Number: 40RM-008--B5/6GC System Configuration: Split System Air Conditioner Energy Efficiency: 10.6 EER Cooling Capacity: 90,000 BTUs / hour ARI Type Code: RCU-A-CB Electrical Service: Triple-phase Electrical Input: 8,490 watts per hour Voltage: 230 and 208 and 460

12000 btu's per Ton, equals to 7.5 Tons.

The Tonnage appears to be 2 1/2 ton,
024=24,000 BTU=2ton
030=30,000 BTU=2 1/2ton
036=36,000 BTU= 3ton

I dont think you have the correct Model Number, Look
on the outdoor unit, the model number might start with a 38. Hint Carrier and Bryant Products are the Same, just different nametag

ok ready for this? To find the tonnage look at the serial # Tonnage is related to 12's If there, on the serial # there is say 0062490 the tonnage is 24 or two tons 24 divided by 12 equals 2 Say the serial # contains 0063090 then the tonnage is 2 1/2 because of the 30 hopefully you see what I am saying the number in the serial # if it can be divided by 12 or 6 this is the tonnage. If you will send me the serial number I will tell you the tonnage. The serial number is on the outside unit at the copper connections where the electrical lines go in.

Good luck on your repairs hope this helped send me a note online here and if you need I will give you tonnage if you send the model # and serial number with your response> I will check online around 1500 hours on 1/9/10 central time. Remember to look for the numbers that are divisible by either 12 or 6 on the serial number

Dave

Usually the date plate is mounted on the A/C unit near the power connection. Sometimes you have to remove the access plate for the electrical connection to view the data plate and othe information about the unit.

Just be sure you kill the power to the A/C before you go opening up the access cover to prevent getting bit by the 220V-AC voltage inside!

Hope this helps and best regards!

3.5 ton unit

3 1/2 ton unit the 042 tells me.