Manual

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Antifreeze added to boilers must be non-toxic, and must be of a type specifically
intended for use in closed hydronic 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
Number of Total Volume
Boiler Section (Gallons)
3 9.6
4 11.6
5 13.7
PIPING WATER VOLUMES
COPPER PIPE STEEL PIPE
PIPE SIZE
FACTOR FACTOR
½" 82.5 63.5
¾" 40.0 36.0
1" 23.3 22.2
1-IA" 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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