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MFC Series Boiler Vent and Combustion Air Guide
TABLE 4: Discharge Flue Vent Pressure Drop (Eq. Ft.)
Single MFC 8000 Boiler (Assuming 180°F Water Temperature and 20°F Rise at Sea Level)
FLUE VENT
(IN. DIA.)
16
18
20
22
24
Single MFC 10000 Boiler (Assuming 180°F Water Temperature and 20°F Rise at Sea Level)
FLUE VENT
(IN. DIA.)
16
18
20
22
24
TAG-0080_OG • GF-148-V •
FLUE
STRAIGHT
VELOCITY
RUN (EQ. FT
(FT/SEC)
/ FOOT)
27.33
0.33
21.60
0.18
17.49
0.11
14.46
0.07
12.15
0.04
FLUE
STRAIGHT
VELOCITY
RUN (EQ. FT
(FT/SEC)
/ FOOT)
34.13
0.51
26.97
0.28
21.84
0.17
18.05
0.10
15.17
0.07
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90° ELBOW
45° ELBOW
(EQ. FT)
(EQ. FT)
4.33
3.38
2.57
2.01
1.61
1.26
1.05
0.82
0.71
0.55
90° ELBOW
45° ELBOW
(EQ. FT)
(EQ. FT)
6.75
5.27
4.01
3.13
2.51
1.96
1.64
1.28
1.11
0.86
33
EXIT LOSS
EXIT LOSS
HORIZ. TERM.
RAIN CAP
(EQ. FT)
(EQ. FT)
9.68
17.98
6.04
11.22
3.97
7.36
2.71
5.03
1.91
3.55
EXIT LOSS
EXIT LOSS
HORIZ. TERM.
RAIN CAP
(EQ. FT)
(EQ. FT)
15.09
28.03
9.42
17.50
6.18
11.48
4.22
7.84
2.98
5.54
Page 22 of
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