# How do you find the tonnage of a Carrier AC unit?

Simply **divide the BTUs by 12,000** to calculate the tonnage of your unit. For example, if your air conditioner is 36,000 BTUs, you have a 3-ton unit. Some manufacturers bury tonnage or BTU information in their model numbers. Look for an even, two-digit number between 18 and 60.

## How do I know if my AC is 1 ton or 1.5 ton?

Page Contents

*And the one thing you need to know is the tonnage of your unit you got to find out how big it is in british thermal units. And that basically is the heat of a birthday candle. Enough heat to raise one*

## How do you read a carrier model number?

Carrier/Payne/Bryant

Carrier systems made in the last 20 years or so **encode the week and year of manufacture within the first 4 digits**. The first 2 are the week of the year (1-52) and the second are the year. For example 0199 would mean the system was made the first week of January in 1999.

## What do carrier model numbers mean?

The main purpose of the Carrier model number lookup is **to know the size or tonnage of the air conditioner systems**. Tonnage is a measure of BTU’s in 12,000 BTU increments. A ton of air conditioning equals 12,000 BTU. Residential air conditioners usually range from 1.5 to 5 tons (or, 18,000 – 60,000 BTUh).

## What is AC tonnage?

Air conditioning tonnage has nothing to do with weight. **A ton, as used in the HVAC field, is a term that describes how much heat the AC unit can remove from a home in one hour**. The measurement for heat is the British thermal unit (BTU). One ton of air conditioning can remove 12,000 BTUs of air per hour.

## How do you read the tonnage on a carrier RTU?

Look for the 7th and 8th digits, or maybe 8th and 9th digits, of the model number. It will be a number divisible by 6 or 12, and represents the nominal BTU of the system in thousands. A ton of air conditioning equals 12,000 BTU, and 48 divided by 12 equals 4, so the data plate below indicates the system is 4 tons.

## What tonnage is my YORK air conditioner?

**Look for first two numbers in the model number.** **They are divisible by 6 or 12, which represent the nominal BTU of the system in thousands**. A ton of air conditioning equals 12,000 BTU, and 48 divided by 12 equals 4, so the data plate below indicates the system is 4 tons.

## How do I read my air conditioner model number?

Look at the model number (**Located on the data plate stamped on the actual side of the compressor) on the compressor and there should be a number divisible by 12**. It should start at 18 and not be more than 60 for residential AC units. 18 to equal 1.5 tons and 60 to equal 5 tons of cooling.

## How many seer is my Carrier AC unit?

How To Find The SEER Rating. **Head over to your cooling system and look for a yellow and black “energyguide” sticker, which can usually be located on the side of the condenser**. If this sticker is still in tact, it will tell you the Seasonal Energy Efficiency Ratio in large numbers.

## Does a 3-ton AC unit weigh 3 tons?

Air conditioner cooling capacity is described in ‘tons. ‘ One ton means the rate of heat transfer needed to freeze one ton of water in 24 hours. This is equivalent to 12,000 Btu/hr. So, a 3-ton AC for instance, **does not actually weigh 3 tons**.

## How do you calculate the size of an air conditioner?

To calculate the size of the air conditioner you need for a room, first, **multiply the length of the room with its width**. Then multiply it with 25 BTU to get the ample cooling for the room under different weather conditions. For example, if the room is 15 feet long and 12 feet wide, it comes to 180 square feet.

## How many tons is 3500 square feet?

3-ton is equal to 36,000 BTU. If you apply the 20 BTU per sq ft rule of thumb, you can see that a 3-ton air conditioner cools about 1,800 square feet spaces.

Tonnage Table.

Area (Square Feet): | BTU | Tonnage |
---|---|---|

3,000 sq ft | 60,000 BTU | 5 Tons |

3,300 sq ft | 66,000 BTU | 5.5 Tons |

3,600 sq ft | 72,000 BTU | 6 Tons |

## What is the thumb rule for AC tonnage calculation?

The most common rule of thumb is to use **500 square feet per ton** to determine the size of air conditioner needed. Or 400 or 600 or some other number in that general vicinity.