Installation Instructions
Owner's Guide
Page
24
-Natural Gas (NG) Supply Piping-
For example: The section from A to B supplies gas to the furnace, range and dryer. Adding up the BTU
requirements and dividing by 1,000 yields a cubic ft. requirement of 220 cubic ft. of gas. The farthest
appliance is the range, which is 50 ft. away from the meter. Looking at the above chart, and under the
column of 50 ft., section A to B needs to be 1” in order to supply 220 cubic ft.
Based on energy content of 1,000 BTU/Cubic ft.: The micro-boiler requires 120 Cubic ft./hr
Based on energy content of 1,000 BTU/Cubic ft:
Maximum delivery capacity of cubic feet of gas per hour of IPS Pipe carrying natural gas with 0.60
specic gravity based on pressure drop of 0.5” W.C.
-Propane (LP) Supply Piping-
Pipe Size Length
Diameter 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’
1/2” 172 118
3/4” 363 249 200 171 152 138 127 118
1” 684 470 377 323 286 259 239 222 208 197 174 158 135
1 ¼” 1,404 965 775 663 588 532 490 456 428 404 358 324 278
1 ½” 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
Pipe Size Length
Diameter 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’
1/2” 268 184 148 126 112
3/4” 567 393 315 267 237 217 196 185 173 162 146 132 112
1” 1,071 732 590 504 448 409 378 346 322 307 275 252 213
1 ¼” 2,205 1,496 1,212 1,039 913 834 771 724 677 630 567 511 440
1 ½” 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
Unit: kBTU per hour
Divide each appliance’s BTU requirement by 1,000 BTH/h to get the appliances Cubic Ft. 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. requirements of the appliances that are being supplied by that section, and size to the
farthest appliance.
Installation - Gas
A B
C
HS120
Micro-boiler
120,000 BTU/h
Gas Meter
Furnace
120,000 BTU/h
10' Length
1” Pipe Size
10' Length
½” Pipe Size
10' Length
1¼” Pipe Size
15' Length
1” Pipe Size
10' Length
¾” Pipe Size
Dryer
35,000 BTU/h
10' Length
Range
65,000 BTU/h
15' Length
½” Pipe Size½” Pipe Size