13
8.
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.
Number of
Total Volume
Boiler Section
(Gallons)
3
9.6
4
11.6
5
13.7
BOILER WATER VOLUMES
PIPING WATER VOLUMES
COPPER PIPE
STEEL PIPE
FACTOR
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
in table to determine volume in gallons.
PIPE SIZE
Divide total length of piping in feet by appropriate factor
