![background image](http://html1.mh-extra.com/html/watts/aerco-mfc-series/aerco-mfc-series_pre-installation-application-manual_3981075021.webp)
MFC Series Boiler Vent and Combustion Air Guide
TAG-0080_OG
•
GF-148-V
•
3/29/2023
Technical Support
•
(800) 526-0288
•
Mon-Fri, 8 am - 5 pm EST Page 21 of
33
19.
Pressure Drop and Draft Data Tables
TABLE 4: Discharge Flue Vent Pressure Drop (Eq. Ft.)
Single
MFC 3000
Boiler
(Assuming 180°F Water Temperature and 20°F Rise at Sea Level)
FLUE VENT
(IN. DIA.)
FLUE
VELOCITY
(FT/SEC)
STRAIGHT
RUN (EQ. FT
/ FOOT)
90° ELBOW
(EQ. FT)
45° ELBOW
(EQ. FT)
EXIT LOSS
HORIZ. TERM.
(EQ. FT)
EXIT LOSS
RAIN CAP
(EQ. FT)
8
29.28
1.24
7.54
5.68
11.58
21.50
10
19.13
0.40
2.68
2.05
4.74
8.81
12
13.28
0.16
1.17
0.90
2.29
4.25
14
9.76
0.08
0.58
0.46
1.23
2.29
16
7.47
0.04
0.32
0.25
0.72
1.34
Single
MFC 4000
Boiler
(Assuming 180°F Water Temperature and 20°F Rise at Sea Level)
FLUE VENT
(IN. DIA.)
FLUE
VELOCITY
(FT/SEC)
STRAIGHT
RUN (EQ. FT
/ FOOT)
90° ELBOW
(EQ. FT)
45° ELBOW
(EQ. FT)
EXIT LOSS
HORIZ. TERM.
(EQ. FT)
EXIT LOSS
RAIN CAP
(EQ. FT)
12
24.30
0.38
3.91
3.03
7.65
14.21
14
17.85
0.18
1.96
1.52
4.13
7.67
16
13.67
0.09
1.08
0.84
2.42
4.49
18
10.80
0.05
0.64
0.50
1.51
2.81
20
8.75
0.03
0.40
0.31
0.99
1.84
Single
MFC 5000
Boiler
(Assuming 180°F Water Temperature and 20°F Rise at Sea Level)
FLUE VENT
(IN. DIA.)
FLUE
VELOCITY
(FT/SEC)
STRAIGHT
RUN (EQ. FT
/ FOOT)
90° ELBOW
(EQ. FT)
45° ELBOW
(EQ. FT)
EXIT LOSS
HORIZ. TERM.
(EQ. FT)
EXIT LOSS
RAIN CAP
(EQ. FT)
12
30.40
0.58
6.13
4.74
11.98
22.24
14
22.34
0.27
3.07
2.39
6.47
12.01
16
17.10
0.14
1.69
1.32
3.79
7.04
18
13.51
0.08
1.01
0.78
2.37
4.39
20
10.94
0.05
0.63
0.49
1.55
2.88
Single
MFC 6000
Boiler
(Assuming 180°F Water Temperature and 20°F Rise at Sea Level)
FLUE VENT
(IN. DIA.)
FLUE
VELOCITY
(FT/SEC)
STRAIGHT
RUN (EQ. FT
/ FOOT)
90° ELBOW
(EQ. FT)
45° ELBOW
(EQ. FT)
EXIT LOSS
HORIZ. TERM.
(EQ. FT)
EXIT LOSS
RAIN CAP
(EQ. FT)
12
30.59
0.64
6.20
4.80
12.13
22.53
14
22.48
0.29
3.11
2.42
6.55
12.16
16
17.21
0.15
1.72
1.34
3.84
7.13
18
13.60
0.08
1.02
0.79
2.40
4.45
20
11.01
0.05
0.64
0.50
1.57
2.92