GAS GRIDDLE ORIFICE REFERENCE TABLE FOR ALITITUDE AND BTU CONTENT
NOTE:
This Table represents the standard upper and lower ranges of BTU per cubic foot content. There is no relationship
between the natural gas BTU content and the propane BTU content as shown in each section of this Table.
HEAT VALUE BTU/CU FT. (NATURAL GAS - 990, PROPANE GAS - 2200)
PILOT BURNER
24" GRIDDLE
MAIN
BURNER
36" GRIDDLE
MAIN
BURNER
48" GRIDDLE
MAIN
BURNER
Altitude ft
NG
LP
NG
LP
NG
LP
NG
LP
0 - 3,999
#57
#71
#46
#54
#38
#51
#40
#52
4,000 -
#59
#71
#46
#54
#41
#51
#43
#52
5,000 -
#60
#71
#49
#55
#42
#52
#43
#52
6,000 -
#61
#71
#49
#55
#42
#52
#44
#53
7,000 -
#62
#71
#50
#55
#43
#52
#45
#53
8,000 -
#63
#72
#51
#55
#44
#52
#45
#54
9,000 -
#64
#73
#51
3/64
#45
#54
#47
#54
10,000 +
#65
#74
#52
#56
#46
#54
#48
#55
HEAT VALUE BTU/CU FT. (NATURAL GAS - 1000, PROPANE GAS - 2300)
Altitude ft
NG
LP
NG
LP
NG
LP
NG
LP
0 - 3,999
#59
#70
#46
#54
#38
#51
#40
#52
4,000 -
#59
#70
#46
#55
#38
#52
#40
#52
5,000 -
#60
#70
#49
#55
#43
#52
#43
#53
6,000 -
#61
#71
#49
#55
#43
#52
#44
#53
7,000 -
#62
#72
#50
#55
#44
#53
#45
#53
8,000 -
#63
#73
#51
3/64
#44
#53
#45
#53
9,000 -
#64
#73
#51
#56
#45
#53
#47
#54
10,000 +
#65
#74
#52
#57
#46
#54
#48
#55
HEAT VALUE BTU/CU FT. (NATURAL GAS - 1100, PROPANE GAS - 2400)
Altitude ft
NG
LP
NG
LP
NG
LP
NG
LP
0 - 3,999
#59
#70
#48
#54
#42
#51
#42
#52
4,000 -
#61
#70
#49
#55
#42
#52
#44
#52
5,000 -
#62
#71
#50
#55
#43
#52
#45
#53
6,000 -
#63
#72
#50
#55
#44
#53
#45
#53
7,000 -
#64
#72
#51
3/64
#45
#53
#46
#54
8,000 -
#65
#73
#52
#56
#45
#53
#47
#54
9,000 -
#66
#74
#52
#57
#47
#54
#48
#54
10,000 +
#66
#74
#52
#57
#48
#55
#49
#55
HEAT VALUE BTU/CU FT. (NATURAL GAS - 1200, PROPANE GAS - 2500)
Altitude ft
NG
LP
NG
LP
NG
LP
NG
LP
0 - 3,999
#61
#71
#49
#54
#43
#51
#44
#52
4,000 -
#63
#71
#50
#54
#44
#51
#44
#52
5,000 -
#64
#72
#51
3/64
#44
#53
#45
#53
6,000 -
#64
#72
#51
3/64
#45
#53
#47
#55
7,000 -
#65
#72
#52
3/64
#46
#54
#48
#55
8,000 -
#66
#72
#52
#57
#48
#54
#49
#55
9,000 -
#66
#72
#53
#57
#48
#54
#49
#55
10,000 +
#67
#72
#53
#57
#49
#55
#50
3/64
HEAT VALUE BTU/CU FT. (NATURAL GAS - 1300, PROPANE GAS - 2700)
Altitude ft
NG
LP
NG
LP
NG
LP
NG
LP
0 - 3,999
#62
#71
#50
#55
#44
#52
#45
#53
4,000 -
#64
#72
#51
3/64
#45
#53
#47
#53
5,000 -
#65
#73
#51
3/64
#45
#53
#48
#54
6,000 -
#66
#73
#52
#56
#47
#53
#48
#54
7,000 -
#66
#74
#53
#56
#48
#54
#49
#54
8,000 -
#67
#74
#53
#57
#48
#54
#50
#55
9,000 -
#68
#74
#53
#58
#49
#55
#50
#55
10,000 +
#69
#75
#54
#59
#50
#55
#51
3/64
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