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HIGH ALTITUDE DERATION – PROPANE GAS
ALTITUDE ABOVE
38,000
SEA LEVEL
(SC Models)
56
0 to 1,999 FT
10.0
56
2,000 to 2,999 FT
9.0
56
3,000 to 4,999 FT
8.5
57
5,000 to 5,999 FT
10.0
57
6,000 to 7,999 FT
9.0
57
8,000 to 10,000 FT
8.5
ALTITUDE ABOVE
SEA LEVEL
2,000 FT
3,000 FT
4,000 FT
5,000 FT
6,000 FT
7,000 FT
8,000 FT
9,000 FT
10,000 FT
INPUT (BTU)
38,000
54,000
72,000
(SD Models)
60
56
56
10.0
10.0
10.0
60
56
56
9.0
9.0
9.0
60
56
56
8.5
8.5
8.5
61
57
57
8.5
10.0
10.0
61
57
57
8.0
9.0
9.0
61
57
57
7.5
8.5
8.5
Table 12. High Altitude Deration – Propane Gas
LOCAL HEATING VALUES FOR NATURAL GAS
650
700
750
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
LOW
HIGH
Table 13. Natural Gas Heating Values
90,000
108,000
118,000
56
56
55
10.0
10.0
10.0
56
56
55
9.0
9.0
9.0
56
56
55
8.5
8.5
8.5
57
57
56
10.0
10.0
10.0
57
57
56
9.0
9.0
9.0
57
57
56
8.5
8.5
8.5
BTU PER CUBIC FOOT
800
850
900
950
LOW
LOW
LOW
HIGH
LOW
LOW
LOW
HIGH
HIGH
HIGH
LOW
LOW
LOW
LOW
HIGH
HIGH
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
120,000
55
ORIFICE SIZE
10.0
MANIFOLD PRESSURE
55
ORIFICE SIZE
9.0
MANIFOLD PRESSURE
55
ORIFICE SIZE
8.5
MANIFOLD PRESSURE
56
ORIFICE SIZE
10.0
MANIFOLD PRESSURE
56
ORIFICE SIZE
9.0
MANIFOLD PRESSURE
56
ORIFICE SIZE
8.5
MANIFOLD PRESSURE
1,000
1,050
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
41
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