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HVAC Tonnage Simplified

Post Tue Jun 26, 2012 2:41 pm

Posts: 1
Central air conditioning systems are rated by tons and British Thermal Units (BTUs). In most cases the label on your central air system will not list this information. Luckily, with a simple math calculation, you can easily figure out the actual tonnage of your central air conditioning.


1. Find the label on your air condenser unit and look for the BTU rating and the tonnage rating. The air condenser in a split system air conditioning apparatus is the unit located outside your house. If you do not have an outside unit, the label will be located in the inside unit. If the label on your air conditioning system lists the tons, no more calculation is needed as you will have found the tonnage of your cooling system.

2. Divide the BTUs on the label by 12,000. You need to use this number as the divisor because there are 12,000 BTUs per ton. The result of this calculation will be the tons of your central air conditioning system. For example, assume that your system is labeled as having 60,000 BTUs. Dividing 60,000 by 12,000 will give you 5 tons. This is the most accurate method of determining the tons on your central air conditioning system when your label does not indicate the tons on it directly.

3. Find the model number on your label. If your system happens to not have the BTU or the tons information listed, locate the model number on the label. Contact us by using our Live Chat feature on top of the page and provide us with the model number. We will do our absolute best by looking up the tonnage of the system by using the model number.

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