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NOTE: All charts on this page are reference only.
HI-FIRE COMMERCIAL GAS (HF)
OIL FIRED (G-O SERIES)
POWER GAS (PG)
A) 1965-1983 models coded with one letter,
followed by five numbers.
Example: M78013...Built in December of 1978
First letter indicates month produced.
The next two numbers indicate year produced.
The remaining three numbers are production codes.
1
ST
LETTER
A
= January
B
= February
C
= March
D
= April
E
= May
F
= June
G
= July
H
= August
J
= September
K
= October
L
= November
M
= December
1984-Present models coded with eight numbers.
Example: 85040000...April, 1985
First two numbers indicate year produced.
The third and fourth numbers indicate the month produced.
The final four numbers are production codes.
DATA PLATE LOCATION:
A. Hi-Fire
Left of the gas valve.
B. Power Gas
Left of the gas valve.
C. Oil-Fired (G-O Series)
On the front of the jacket, at the top.
thru 1986
thru 1986
thru 1986
1
ST
TWO NUMBERS
75
= 1975
76
= 1976
77
= 1977
78
= 1978
79
= 1979
80
= 1980
81
= 1981
82
= 1982
83
= 1983
84
= 1984
85
= 1985
86
= 1986
COPPER-FIN
®
WATER HEATERS (CFW) 1968-1981
COPPER-FIN BOILERS (CFB)
The Copper-Fin heaters have a number followed
by a letter(s) then three numbers.
Example: 5Y013...Built in May 1978
First number indicates month produced.
Next letter(s) indicates year produced.
Final three numbers are production codes.
1
ST
NUMBER
1
= January
2
= February
3
= March
4
= April
5
= May
6
= June
7
= July
8
= August
9
= September
10
= October
11
= November
12
= December
DATA PLATE LOCATION:
On the top left corner of Copper-Fin, from the front
controls.
MOD-U-POWER (MUP)
The Mod-U-Power has a single letter,
six number serial code.
Example: J-930001...Built in September of 1993
First letter indicates month produced.
Next two numbers indicate year produced.
The remaining numbers are production codes.
ST
1
LETTER
A
= January
B
= February
C
= March
D
= April
E
= May
F
= June
G
= July
H
= August
I
= September
J
= October
K
= November
L
= December
4
1968-1981
1
ST
LETTER
P
= 1970
R
= 1971
S
= 1972
T
= 1973
U
= 1974
V
= 1975
W
= 1976
X
= 1977
Y
= 1978
Z
= 1979
AA
= 1980
BB
= 1981
1978-1984
ST
ND
1
& 2
NUMBER
78
= 1978
79
= 1979
80
= 1980
81
= 1981
82
= 1982
83
= 1983
84
= 1984
7/08–Printed in U.S.A.
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