Installation Instructions

22
Natural Gas Supply Piping
Maximum delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe carrying Natural Gas with 0.60
Specic Gravity Based on Pressure Drop of 0.5”W.C.
Based on Energy Content of 1,000 BTU/Cubic ft.: The micro boiler requires 199 Cubic ft./hr.
Propane (LP) Supply Piping
Maximum Capacity of Propane (LP) Based on 11” W.C. supply pressure at 0.5” W.C. pressure drop.
Based on Energy Content of 1,000 BTU/Cubic ft.
Divide each appliance’s BTU/h requirement by 1,000 BTU/ft³ to get the appliances ft³/h requirement.
Take into account the distance the appliance is from the gas meter, look in the above gas chart to properly size the line.
For sections of the gas line supplying gas to more than one appliance (Ex. Point A to Point B), add up the cubic ft. per
hour requirements of the appliances that are being supplied by that section, and size to the farthest appliance.
For Example: The section from A to B supplies gas to the furnace, range and dryer. Adding up the BTU/h requirements
and dividing by 1,000 yields a cubic ft. per hour requirements of 220 cubic ft. of gas per hour. The farthest appliance is the
range, which is 50 ft. away form the meter. Looking at the above chart, and under column of 50 ft., Section A to B needs to
be 1” in order to supply 220 cubic ft.
Pipe Size Length
10' 20'Diameter 30' 40' 50' 60' 70' 80' 90' 100' 125' 150' 200'
3/4"
363 249 200
1" 684 470 377 323 286 259 239 222 208
1
1/4"
1,404 965 775 663 588 532 490 456 428 404 358 324 278
1
1/2"
2,103 1,445 1,161 993 880 798 734 683 641 605 536 486 416
2" 4,050 2,784 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033 936 801
Unit: Cubic feet per hour
Micro-
boiler
Dryer
199,000 BTU/h
35,000 BTU/h
Furnace
Gas meter
Range
120,000 BTU/h
A
B
65,000 BTU/h
C
10' Length
1/2" Pipe size
15' Length
1/2" Pipe size
15' Length
1" Pipe size
10' Length
3/4" Pipe size
10' Length
5' Length
1" Pipe size
1-1/4" Pipe size
10' Length
3/4" Pipe size
5' Length
1-1/4" Pipe size
Unit: kBTU per hour
elpmaxe gnizis saG
(Natural Gas)
LengthPipe Size
10'Diameter 20' 30' 40' 50' 60' 70' 80' 90' 100' 125' 150' 200'
3/4"
567 393 315 267 237 217
1" 1,071 732 590 504 448 409 378 346 322 307 275 252 213
2,2051
1/4"
1,496 1,212 1,039 913 834 771 724 677 630 567 511 440
1
1/2"
3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976 866 787 675
2" 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496 1,260