How Many Tons Is My Old Trane XE1200 AC Unit?

If you have an older Trane XE1200 air conditioner, you might be wondering: How many tons is my unit? Knowing your AC’s cooling capacity is important for repairs, replacements, or upgrades.

Since the Trane XE1200 is a classic model (popular in the 1980s–1990s), its labels might be faded or hard to read. But don’t worry—this guide will walk you through five easy ways to find out your unit’s tonnage.

Note: The Trane XE1200 was a reliable unit, but if yours is still running after 20+ years, it might be time to consider an upgrade for better efficiency!

Knowing your AC’s tonnage helps with:

• Replacing the unit – Buying the right size is crucial for efficiency.
• Troubleshooting problems – Some repairs depend on capacity.
• Upgrading your system – A mismatched size can cause high energy bills.

1. Check the Model Number

The most accurate way to determine tonnage is by decoding the model number, which is printed on the unit’s metal nameplate.

Where to Find the Model Number:

• Look on the outdoor condenser unit (the big metal box outside your home).
• The label is usually on the side panel, back, or near the electrical connections.

How to Read the Model Number:

Trane model numbers often follow a pattern like:

• TWE036C100A0
• TWB048D200B1

The key digits are the numbers after “TWE” or “TTP”:

• First three digits = BTU rating in thousands
• Divide by 12 to get tons

Example:

• 036 = 36,000 BTU → 36 ÷ 12 = 3 tons
• 048 = 48,000 BTU → 48 ÷ 12 = 4 tons

Common Trane XE1200 Tonnages:

• 018 = 1.5 tons
• 024 = 2 tons
• 030 = 2.5 tons
• 036 = 3 tons
• 042 = 3.5 tons
• 048 = 4 tons
• 060 = 5 tons

If you find your model number, reply with it, and I can confirm the tonnage for you!

2. Look for the BTU Rating

If the model number isn’t clear, check for the BTU (British Thermal Unit) rating on the nameplate.

How to Convert BTU to Tons:

• 12,000 BTU = 1 ton
• 24,000 BTU = 2 tons
• 36,000 BTU = 3 tons
• 48,000 BTU = 4 tons

Example:
If your unit says "36,000 BTU", then:
36,000 ÷ 12,000 = 3 tons

3. Measure the Condenser Size

If the label is faded or missing, you can estimate tonnage based on the physical size of the outdoor unit.

Approximate Sizes:

• Small (24″–28″ wide) → 1.5–2.5 tons
• Medium (30″–36″ wide) → 3–4 tons
• Large (38″–42″ wide) → 4.5–5+ tons

Note: This isn’t exact, but it helps if other methods aren’t possible.

4. Check the Air Handler or Furnace

Sometimes, the indoor unit’s model number matches the outdoor unit’s capacity.

Where to Look:

• Check the furnace or air handler (usually in the attic, basement, or closet).
• Look for a similar model number (e.g., TWE036 = 3 tons).

5. Review Old Paperwork or Manuals

If you still have the original installation receipt, manual, or warranty paperwork, it might list the tonnage.

Where to Search:

• Check home files, old utility bills, or HVAC service records.
• If you know the installing company, they might have records.

What If I Still Can’t Find It?

If the label is completely unreadable, you might need to:

• Call an HVAC technician (they can check refrigerant levels or electrical specs).
• Estimate based on home size (rule of thumb: 1 ton per 400–600 sq ft).

Finding the tonnage of your Trane XE1200 isn’t too hard if you know where to look. Start with the model number, then try BTU ratings, physical size, or indoor unit details.

If you’re still unsure, reply with any numbers you find, and I’ll help decode them!