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

Find the model number. Within this string of letters and numerals, you should find an even, two-digit number. The possibilities on residential units range from 18 to 60. Divide the number by 12 (which represents 12,000 Btu/hr, or one ton of cooling capacity) to get your AC unit’s tonnage.

How do you read a Heil serial number?

The Heil brand is produced by International Comfort Products. Units produced since the early 1990s have a serial number that is a single letter followed by a series of numbers. The first two numbers are the year of manufacture. So the serial number shown below indicates that the condenser unit was manufactured in 1991.

How do I read the model number on my AC unit?

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.

What is AC tonnage?

Tonnage is actually a measure of how powerful an AC is at cooling down a space. Tons are units of cooling power, so when we say that a system is a “two ton” or “five ton” unit, we’re indicating how powerful it is, not its weight. One ton = 12,000 BTUs of heat removed per hour from a space.

How do I tell what size my AC unit is?

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.

Where is AC tonnage usually encoded?

How do I know what size my AC compressor is?

How can I tell the tonnage of my AC carrier?

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.

How do I know what HP air conditioner to buy?

1) Horsepower – How much is needed? The basic rule of thumb is the bigger the room is, the higher the cooling capacity is required. Another factor to consider is the amount of heat exposure the room has during the day. If the room has direct sunlight, it might need bigger HP to bring the temperature down.

How many BTUs is a ton?

12,000 Btu/hr
Air conditioners work something like blocks of ice in that they don’t produce cool air, but rather remove heat from the building. The capacity of an air conditioner refers to the amount of heat it can remove. Rounding up 11,917 Btu/hr gives you 12,000 Btu/hr, which is one ton of air conditioner capacity.

How do you decode a carrier model number?


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.

How do you read carrier serial numbers?

The most common way to to determine the carrier ac age is through the serial number. In the above style, the determining factor is having a letter in the middle of the serial number. The first two digits are the week of manufacturer. The second set of digits are the year of manufacture.

How many sq ft will a 3-ton AC cool?

1,800 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.

How do I find the manufacture date of my air conditioner?

Finding the Manufacturer’s Date of Your Air Conditioner

On most units, the nameplate is fixed to the backside of the cabinet. Near the top of the nameplate you should see the manufacturer’s date as a month and year. (Sometimes the manufacturer’s date is abbreviated as MFR DATE.)

How many tons is a 80000 BTU furnace?

In terms of tonnage, an 80,000 BTU gas furnace is typically a 4-ton unit.

Do I need 2 ton or 3-ton AC?

If you live in a home that’s about 1,800 square feet, has standard 8-foot ceilings, average sun exposure, and it’s a cold climate, you’ll probably need a 3-ton, (36,000 BTUs) unit. Change that to a hot climate, and you’ll need to upsize that to a 3.5-ton (42,000 BTUs) unit. Assuming all variables remain the same.

How do you tell the tonnage of a room?

How to calculate :
  1. Area Method : To calculate, multiply the length and breadth of the room (in feet), take square-root of the answer and divide by 10. The resulting number will give the desired tonnage.
  2. Volume Method : Alternatively, multiply the length, breadth and height of a room (in feet). Divide the answer by 1000.

How many tons AC do I need for 1000 square feet?

DIY Calculations
Square FootageBTUs per hourAC Unit Tonnage
450 to 55012,0001 Ton
550 to 70014,0001.5 Tons
700 to 1,00018,0001.5 Tons
1,000 to 1,20021,0002 Tons
Jun 23, 2020