How To Determine Ac Tonnage From Model Number Lennox . (1) locate the model number your researching. If you don’t want to do the math, here are the numbers you’re looking for and their corresponding tonnage:
Tonnage is a measure of btu’s in 12,000 btu increments. If you don’t want to do the math, here are the numbers you’re looking for and their corresponding tonnage: Click to see full answer.
Some manufacturers bury tonnage or btu information in their model numbers.
The model number is where you can find the size of ac. The model number is where you can find the number you’re looking for. Next, divide that number by 12,000 to determine the tonnage capability you need in your new air conditioning unit. The possibilities on residential units range from 18 to 60.