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Gas Requirements
Gas Pipe Size Required for 1000 Btu Natural Gas — 0.64 Specific Gravity at 7 ± 1.5 inches
25 feet
(7.63 m)
GasAppliances
Total Btu/hr.
1,300,000
2 (50.80)
1,400,000
2 (50.80)
1,500,000
2 (50.80)
1,600,000
2 (50.80)
1,700,000
2 (50.80)
1,800,000
2.5 (63.50)
1,900,000
2.5 (63.50)
2,000,000
2.5 (63.50)
2,200,000
2.5 (63.50)
2,400,000
2.5 (63.50)
2,600,000
2.5 (63.50)
2,800,000
2.5 (63.50)
3,000,000
2.5 (63.50)
For L.P. Gas, correct the total Btu/hr by multiplying it by 0.6. The answer is the equivalent Btu on the above chart.
High Altitude Burner Orifice Sizing
58
(17.4 ± 4 mbar, 1.74 ± 0.37 kPa) Water Column Pressure
50 feet
(15.25 m)
Based on 0.3 in. Water Column Pressure Drop for Length Given
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
©
Published by permission of the copyright owner - DO NOT COPY or TRANSMIT
Equivalent Length
75 feet
100 feet
(22.88 m)
(30.50 m)
Sizes shown in inches (mm)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3.5 (88.90)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
Table 5
125 feet
150 feet
(38.13 m)
(45.75 m)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
4 (101.60)
Part No. 70476301ENR6
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