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8. Antifreeze addedto boilers must be non-toxic, and must be of a type specifically intended for use in closed
b_ydronic heating systems. Under no circumstances should automotive antifreeze be used. Antifreeze used
in any 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
PIPING WATER VOLUMES
Number of
Boiler Sections
3
4
5
Total Volume
(Gallons)
9.6
11.6
I 13.7
COPPER PIPE STEEL PIPE
PIPE SIZE
FACTOR FACTOR
Y2" 82.5 63.5
¾" 40.0 36.0
1" 23.3 22.2
1-1/4" 15.3 12.8
1-1/2" 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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