# AIR CONDITIONING AGE & CAPACITY

# AIR CONDITIONING AGE & CAPACITY

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**AIR CONDITIONING AGE & CAPACITY
**

As a rule-of-thumb, capacity information is encoded by air conditioning manufactures in the model number and date of

manufacture info in the serial number.

There are 12,000 Btu’s per ton of cooling, and air conditioners are sized by every ½ ton.

Manufacturers often encode the approximate rating in Btu’s somewhere in the model number. **THEREFORE IT IS OFTEN SIMPLE TO SCAN THE**

**MODEL NUMBER FOR A TWO-DIGIT NUMBER THAT IS DIVISIBLE BY 6 AND TO DIVIDE IT BY 12 TO**

**DETERMINE THE CAPACITY RATING IN TONS.**

This number can be elusive, as it is not always exactly divisible by 6.

Some manufacturer’s systems make this easier than others. To complicate matters, some manufacturers have

changed their systems of encoding data over time.

**AMANA**

Age: Use B-L-A-C-K H-O-R-S-E code B = 71 or 81 H = 76 or 86

L = 72 or 82 O = 77 or 87

A = 73 or 83 R = 78 or 88

C = 74 or 84 S = 69, 79 or 89

K = 75 or 85 E = 70, 80 or 90

**BRYANT**

Capacity: Look for those elusive two digits in the model number usually (but not always) divisible by 6 and divide by 12

to convert to tons.

Example: 56BAB0042000A0

42 = size on thousands of BTU

42,000 Btu = 3½ ton

From 1964 through 1979 Bryant encoded age information in the R = 1964 A = 1972

serial number with the first two digits indicating week of S = 1965 B = 1973

manufacture and the letter following those first two numbers T = 1966 C = 1974

indicating the year beginning R = 1964: U = 1967 D = 1975

V = 1968 E = 1976

W = 1969 F = 1977

X = 1970 G = 1978

Y = 1971 H = 1979

In subsequent years Bryant simplified its system where, the first two digits of serial number = Week of manufacture.

Third & fourth digits = Year of manufacture. Example: 3188XXXXXX = 31st week of 1988.

**CARRIER**

Carrier has used several different codes at different plants. Information below refers to commonly used codes.

Capacity: Commonly found in the last three to five digits of model number, sometimes in 100s of Btus sometimes in

tons

Example:

001 = 1.5 ton, 002 = 2 ton, 003 = 2.5 ton, 004 = 3 ton, 004-5 = 3.5 ton, 005 = 4 ton, 006 = 5 ton

Or

18xx = 1.5 ton, 24xx = 2 ton, 30xx = 2.5 ton, 36xx = 3 ton, 42xx = 3.5 ton, 48xx = 4 ton, 60xx = 5 ton

Or

14xx = 1 ton, 18xx = 1.5 ton, 024 = 2 ton, 030 = 2.5 ton, 036 = 3 ton, 042 = 3.5 ton, 048 = 4 ton, 060 = 5 ton

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Age: Through the 1960s Carrier used the first digit of the serial number to indicate the year of manufacture. Example:

3xxxxx = 1963, 4xxxxx = 1964, 5xxxxx = 1965, etc.

Beginning in 1970 Carrier began to use a letter followed by a single digit year.

Example: A1 = January 1971, B2 = February 1972, M5 = December 1975

Note: No letter I

A=Jan G=Jul

B=Feb H= Aug

C=Mar J= Sept

D=Apr K= Oct

E=May L= Nov

F= Jun M= Dec

More recently Carrier has simplified things using the first four digits of the serial number to signify the age, where the

first two digits indicate the week and the third and fourth digits indicate the year of manufacture (similar to Bryant).

Example: 3298xxxxxx = 32nd week of 1998

CHRYSLER AIR TEMP

Capacity: Rating in tons found in the fourth and fifth digits of the model number

0 = 1 1.5 ton

2 = 2 ton

3 = 2.5 ton

4 = 3 ton

5 = 4 ton

6 = 5 ton

Example: xx06xxxx = 5 ton

**CLIMATROL**

Capacity: Look for those elusive two digits in the model number (usually, but not always) divisible by 6 and divide by 12

to convert to tons. It is often in the last three to five digits, but is sometimes closer to the middle.

**COASTLINE**

Capacity: Look for those elusive two digits in the model number (usually, but not always) divisible by 6 and divide by 12

to convert to tons. It is often in the last three to five digits, but is sometimes closer to the middle.

**COLEMAN**

Coleman has used several different codes at different plants. Information below refers to some commonly used codes.

Capacity: Commonly found in the third and fourth digits of the model number sometimes in 100s of Btu’s and

sometimes as tons.

Example: xx30 = 2.5 ton, xx48 = 4 ton or xx02 = 2 ton, xx05 = 5 ton

**DAY-NIGHT LATER MANUFACTURED AS “BDP” (BRYANT, DAY-NIGHT, PAYNE)**

Capacity: Look for those elusive two digits in the model number (usually, but not always) divisible by 6 and divide by 12

to convert to tons. It is often in the last three to five digits, but is sometimes closer to the middle.

Age: First two letters of the serial number indicate age, where the first letter is the month and the second letter the year

of manufacture beginning with 1970

A=1970, B=1971, C=1972, Etc.

**DUCANE**

Two different formats on serial numbers are used. All of serial numbers are ten characters.

The most common format is all ten characters are numeric. In this format the numbers in position 7 and 8 indicate the

calendar year and the numbers in position 9 and 10 indicate the week of the year.

Example is XXXXXX9933 where the 99 would be 1999 and the 33 would be the 33rd week of the year (1999).

The more recent format is ten characters. The format is that the first four characters are numeric, the fifth character is

alpha, and the last five characters are numeric.

The year code is determined from the numbers in the 3rd and 4th position, which would be the last 2 digits of the

calendar year (ex: 06=2006). The fifth character which is alpha represents the month with A=January and

M=December and but they do not use the LETTER I.

**FEDDERS**

Capacity: Last two digits of the model number indicate 1000s of Btus

Example: CF30 = 2.5 ton

Age (through 1977): Last two letters of serial number

indicate month & year beginning with September 1966

A=Sept

B=Oct

C=Nov

Etc

A= 1966

B=1967

C=1968

Etc.

Note: I – not used

Example:

xxxxAA = September 1966, xxxxBC = October 1968

**GENERAL ELECTRIC**

Capacity: Last three digits of model number indicate approximate rating in 1000s of Btus

Example: 21TC030A = 2.5 ton

Age: Last three digits of serial number indicate date of manufacture, where the first digit indicates the year and the

second and third indicate the week

Example: xxxxxx241 = 41st week of 1982

**KEEPRITE**

The date of product/ manufacture or age of a Keeprite furnace or air conditioner can be determined from the serial

number Serial number styles/ formats found:

Style 1: G051650885, Style 2: L920671787, Style 3: 9414B39332

First two numbers represent YEAR. Second two represent WEEK.

**LENNOX**

Capacity: Lennox has its own code found between hyphens in the model number

211=1.5 ton 411=3 ton 651=4.5 ton

261=2 ton 461=3.5 ton

311=2.5 ton 511=4 ton

Example: CHP16H-261-1P = 2 ton

Age: Prior to 1974 the first three digits of the serial number indicate the date of manufacture where the first two digits

indicate the year and the third is the month.

Example: 732xxxx = February 1973

Beginning in 1974 the third and fourth digits indicate the year followed by a letter indicating the month.

Note: I not used

A=Jan, B=Feb, C=Mar, Etc.

**RHEEM OR RUUD**

Capacity: Look for those elusive two digits in the model number (usually, but not always) divisible by 6 and divide by 12

to convert to tons.

Example: RPGC-037JA = 3 ton

Age: Four digits of serial number indicate date of manufacture where first two indicate the week and the third and

fourth are the year. In the 1960s and early `70s this was the last four digits. More recently date of manufacture

information is found closer to the middle of the serial number.

Example: xxxx1872 = 18th week of 1972

**TAPPAN**

Capacity: Look for those elusive two digits in the model number (usually, but not always) divisible by 6 and divide by 12

to convert to tons.

Example: CM36-11B,T = 3 ton

**TRANE**

Capacity: Trane has used a number of different methods for encoding capacity information in the model number. It is

commonly found in the first three digits sometimes and Btus, sometimes as tons.

Example: SPCC-B504-A = 5.0 ton, Or TWS748A = 48,000 Btu = 4 ton

Age: Through the seventies date of manufacture information is found as a number and a letter in the serial number

where the number is the single digit year and the letter indicates the month.

A=Jan, B=Feb, C=Mar, Etc. Example: 1C-xxxx = March 1971

In the early `80s Trane began to stamp the date of manufacture in the lower right hand corner of the data plate.

**WHIRLPOOL**

Capacity: Look for those elusive two digits (often the first two digits) in the model number (sometimes, but not always)

divisible by 6. Divide by 12 to convert to tons.

Age: Date of manufacture information is encoded in the serial number where a letter indicates the decade, first digit

year, the third and fourth digits indicate the week.

G=1970s, H=1980s Example: H43571485 = 35th week of 1984

**YORK** HVAC DATING** (***Un*itary Products since 1984)

Note: they skip the letters I, O, Q, U, Z.

Year of make indicated by 3rd letter in the serial number.

1971 – A

1972 – B

1973 – C

1974 – D

1975 – E

1976 – F

1977 – G

1978 – H

1979 – J

1980 – K

1981 – L

1982 – M

1983 – N

1984 – P

1985 – R

1986 – S

1987 – T

1988 – V

1989 – W

1990 – X

1991 – Y

1992 – A

1993 – B

1994 – C

1995 – D

1996 – E

1997 – F

1998 – G

1999 – H

2000 – J

2001 – K

2002 – L

2003 – M

2004 – N

2005 – P

**YORK** *NEW SERIAL NUMBER — OCTOBER, 2004 TO THE PRESENT DAY
*

Here how to read the new serial number: W 0 E 4 298223

2nd and 4th digits 0 and 4 (number) is the year of manufacture.

To find the year of manufacture you have to combine the 2nd digits with the 4th digits.

Ex. W 0 E 4 298223 was made in 2004. W 0 E 6 298223 was made in 2006. W 1 E 0 298223 was made in 2010.

More examples: If the 2nd and 4th digits look like this: 2nd digits = 0 and the 4th digits is 5 = 2005

07 = 2007

11 = 2011

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