# How can I tell the tonnage of my Heil air conditioner?

## How can I tell the tonnage of my Heil air conditioner?

For Heil, you should look for two numbers in a cluster in the middle of the model number. They are divisible by 6 or 12, and represent the nominal BTU of the system in thousands. A ton of air conditioning equals 12,000 BTU, and 60 divided by 12 equals 5, so the data plate below indicates the system is 5 tons.

### How can you tell the size of AC unit?

To calculate the size, simply multiply the length times the width of the room or area to be cooled. Then, as a practical number, multiply that total times 25 BTU. This allows ample cooling, whether it is a rainy, moist day or a hot, sunny, humid day. Let’s say the room is 12 feet wide by 15 feet long.

How do I read my AC serial number?

In the serial number, the first letter is the place of manufacturer. The first pair of numbers is the year, and the second pair of numbers is the week. For Example, Model No.: NAC042AKA5, SN: E031136011 was Manufactured in 2003, Week 11.

How do I tell how many tons my heat pump is?

Multiply the kilowatt rating by 3,414.45, the number of BTUs in a kilowatt. Divide the result by 12,000, the number of BTUs in a ton. For example, a 5-kw heat pump has 17,072 BTUs. Dividing the BTUs by 12,000 yields 1.42 tons.

## How many square feet will a 1 ton AC unit cool?

400 square feet
A common rule of thumb is to assume that a standard HVAC unit can cool around 400 square feet of residential space per ton of cooling capacity. When calculating the power you need to cool your home, you can assign 12,000BTUs that need to be cooled per 400 square feet of property.

### What size air conditioner do I need for a 12×12 room?

According to Energy Star, a 12×12′ or 144 sqft room requires 5,000 BTU of cooling capacity when occupied by two persons. If the room is heavily shaded, it only requires 4,500 BTU. If the room is very sunny, it requires 5,500 BTU. For each additional person, you need to add 600 BTU.

How old is my AC by serial number?

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 do I know what tonnage my carrier is?

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 many square feet does a 3.5 ton AC unit cover?

Air Conditioning Square Footage Range by Climate Zone

ZONE 1 ZONE 5
2 Tons 901-1200 sf 1101 – 1400 sf
2.5 Tons 1201 – 1500 sf 1401 – 1650 sf
3 Tons 1501 – 1800 sf 1651 – 2100 sf
3.5 Tons 1801 – 2100 sf 2101 – 2300 sf