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Typical Layouts for Hot Water Heating Systems
Figure 3 - Room Sizing - Parallel Reverse Return (3 Boilers shown)
(B)
LEGEND - PIPE SIZING
(S),(R) - 1¼ NPT BOILER SUPPLY AND RETURN
(B) - HEADER SIZING - REFER TO TABLE 3
Note:
• Access * is minimum 24" service clearance�
• Vent position, relief valve location, supply and return piping will vary depending on type of units�
(Supply & Return at Same Wall of Boiler Room)
ACCESS*
SYSTEM
RETURN
(B)
ACCESS*
(R)
(S)
(R)
(S)
(R)
(S)
SYSTEM
SUPPLY
8
10"MIN.*
FRONT
PN 240013666 REV. A [06/30/2022]
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