14
8. Antifreeze added to boilers must be nontox-
ic, and must be of a type specically intended
for use in closed hydronic heating systems.
Under no circumstances should automotive
antifreeze be used. Antifreeze used in any
sYsTeM pipiNg arraNgeMeNT alTerNaTe Near BOiler pipiNg
boiler may reduce capacity by 10% or more
and increase fuel consumption. Tankless
coil performance will fall as concentration of
antifreeze is increased. Refer to boiler and
piping water volumes tables in this manual.
BOILER WATER VOLUMES
Number of
Boiler Section
Total Volume
(Gallons)
3 9.6
4 11.6
5 13.7
PIPING WATER VOLUMES
PIPE SIZE
COPPER PIPE
FACTOR
STEEL PIPE
FACTOR
½” 82.5 63.5
¾” 40.0 36.0
1” 23.3 22.2
1 ¼” 15.3 12.8
1 ½” 10.8 9.5
2” 6.2 5.8
Divide total length of piping in feet by appropriate factor
in table to determine volume in gallons.
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