Lochinvar EFW 85 Installation, Commissioning, User And Maintenance Instructions page 56

Examples A (C63) and B (C33) maximum pipe lengths
Air inlet
Example A (C63)
water heater type →
Diameter air pipe
Diameter flue pipe
Diam. roof terminals
Maximum pipe length
(flue & air total pipe length)
includes: 4 bends 90°
flue outlet zeta = 1.0
air inlet zeta =1.0
Example B (C33)
water heater type →
Diameter air pipe
Diameter flue pipe
Concentric roof terminal
Maximum pipe length
(flue & air total pipe length)
includes: 4 bends 90°
adaptor par-conc
conc. roof terminal
56
Flue outlet
Example A
C63
EFW 85
[mm] 100
[mm] 100
[mm] 100
[m]
51.2
EFW 85
[mm] 100
[mm] 100
[mm] 100/150
[m]
3.4
Concentric roof terminal
concentric/
parallel adaptor
Example B
C33
EFW 105 EFW 125
100 100
100 100
100 100
32.3 17.8
EFW 105 EFW 125
NOT NOT
POSSIBLE POSSIBLE
use less bends use less bends
and/or pipe and/or pipe
length, or larger length, or larger
pipe diameter. pipe diameter.
E93.1804.014
EFW 155
150
150
150
120.9
EFW 155
NOT
POSSIBLE
use less bends
and/or pipe
length, or larger
pipe diameter.