AC & Coil System

Easy System Selector Tool

Use this tool to guide you to the best heating and cooling solution for your home.

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What tonnage do you need for your AC or Heat Pump Condenser?How To Calculate Tonnage

AC Tonnage (Select One)

Please select an AC tonnage to continue.

Width (optional)

Coil Width (Optional)

Please select a coil width to continue.

Since you're not replacing the furnace, what is its airflow direction?

(This helps us match your new AC and coil system correctly.)

Please select an airflow direction to continue.

Sizing Calculator

Square Feet:

Zip Code:

STEP 1: LOCATE YOUR CURRENT SYSTEM'S INFO

You can usually find the BTU listed on your furnace's data sticker, often located inside the cabinet door or on the inner or outer wall of the cabinet. On an air conditioner, the data sticker is typically found on the outer panel of the outdoor condenser unit, often near the electrical disconnect box.

Look for terms like M/N, Prod, Mod No, or Model Number to identify your system. These numbers can also help you find a replacement if needed and the product manual (if you need to look up the BTU/Tonnage).

STEP 2: CALCULATING BTU AND TONNAGE

You can also use the model number to determine BTUs. You'll find an even number within the model number string. Multiply this number by 10,000 to calculate the unit's BTU.

From there, tonnage is typically calculated by dividing BTUs by 12,000 (since 1 ton = 12,000 BTUs).

If you don't have product data available, you can also use our sizing calculator to use square feet to determine your needs.