Cooling Fans
Ambient Temperature: 14˚F to 140˚F (10˚C to 60˚C)
Operating Voltage Range: 15%
MD Series
Materials
Frame: Die Cast Aluminum
Blades: Resin
Flammability Grade: V-0
Overheat Protection: Built-in Overheat Protection Circuit
Bearings: Ball Bearings
4.69 in.1.00 in. thick
( 119 mm25.4 mm thick)
RrDC
Specifications
Voltage
Current
Speed
VDC
A
r/min
CFM
m3/min
MD1225-12
12
0.47
MD1225-24
24
0.26
3100
88.3
2.5
Speed Type
Model
Standard Speed
●How to read the specifications➝Page E-13
inH2O
0.172
Noise Level
Pa
dB(A)
43
45
Frequency — Audible Noise Level (dB)
Measured at a distance of 3.3 feet (1 m) from the fan intake side
60
Static Pressure
[inH2O]
50
0.16
2800
35
0.14
2400
30
0.12
2000
25
0.10
1600
20
0.08
1200
15
0.06
800
10
0.04
400
5
0.02
0
0
0
Speed
Noise Level [dB]
Speed
[r/min]
Static Pressure
[Pa]
40
Max. Static Pressure
●Details of safety standards➝Page G-2
Air Flow — Static Pressure Characteristics
3200
Max. Air Flow
40
30
20
10
0
0
E-50
31.5 63
125 250 500 1 k
1/3 Octave Band
2 k 4 k 8 k 16 k
Center Frequency [Hz]
Static
Pressure
20
0.4 0.8
40
1.2
60
80
100
Air Flow [CFM]
1.6 2.0 2.4 2.8
Air Flow [m3/min]
System Configuration E-19
Accessories E-101
Cooling Fans
Dimensions
Scale 1/4, Unit = inch (mm)
Weight: 0.42 lb. (0.19 kg)
d E021
4.69 (119)
4.1260.012
(104.80.3)
AIR FLOW
ROTATION
Introduction
4.1260.012
(104.80.3)
1.00
0.157 (25.4) 0.157
(4)
(4)
Rotation
MU
4.126 (104.8)
.3
5
4
.5
1
7(
16
)
MBD
0.177 (4.5) 4 Holes
Intake side
Outlet side
MF
Accessories (Sold Separately)
Item
Safety Standards
Page
✽
E-102
Filter
FL12
E-106
Screen
FS12
E-107
Red
Black
12 VDC
GND
✽ These products have been designed to pass tests set forth under the UL and
CSA standards for equipment used in fans. They conform to the standards only
when used with an O.
Thermostats Accessories
Model
FG12D
Finger Guard
MFD
Connection Diagram
Centrifugal Blowers
Cross Flow Fans
AC Input DC Input AC Input DC Input
4.57 (116)
)
36
1
5(
0.177 (4.5) 4 Holes
4.126 (104.8)
MB
4.126 (104.8)
4.126 (104.8)
Scale 1/4, Unit = inch (mm)
DC Input
4.57 (116)
Long Life
MDE
MDS MD
Panel Cut-Out
Axial Flow Fans
AC Input
0. 169 (4.3)
8 Holes
0)
(1 )
39 300
.
0
(
12
Variable
Flow
2 Leads UL Style 1007
AWG 24
MRS
Air Flow
Before Using
a Fan
Finger Guard
● A filter or screen can be installed in place of the finger guard.
E-51
Cooling Fans
Ambient Temperature: 14˚F to 140˚F (10˚C to 60˚C)
Operating Voltage Range: 15%
MD Series
Materials
Frame: Resin
Flammability Grade: V-0
Blades: Resin
Flammability Grade: V-0
Overheat Protection: Built-in Overheat Protection Circuit
Bearings: Ball Bearings
3.62 in.1.00 in. thick
( 92 mm25.4 mm thick)
RrDC
Specifications
Model
Stall Alarm,
Electronic Alarm Type Pulse Sensor Type
q
o
Speed Type
Standard Speed
Middle Speed
Standard Type
MD925A-12S MD925A-12
12
0.24
MD925A-24L
MD925A-24S MD925A-24
MD925AM-12
MD925AM-24
24
0.12
12
0.15
24
0.09
Low Speed
MD925AL-12
12
0.10
MD925AL-24
24
0.07
●How to read the specifications➝Page E-13
●Pulse sensor type is not DEMKO approved.
●Alarm Specifications: q➝Page E-14, o➝Page E-16
Speed [r/min]
Static Pressure
[Pa]
Static Pressure
[inH2O]
Air Flow — Static Pressure Characteristics
70
3000
60
0.25
2500
50
0.20
2000
40
1500
30
10
0
0
Max. Static Pressure Noise Level
dB (A)
CFM
m3/min
inH2O
Pa
3400
45.9
1.30
0.196
49
36
2800
38.8
1.10
0.137
34
31
2200
31.8
0.90
0.0882
22
28
●Details of safety standards➝Page G-2
Frequency — Audible Noise Level (dB)
Measured at a distance of 3.3 feet (1 m) from the fan intake side
MD925A
Speed
MD925AM
MD925AL
Noise Level [dB]
0.30
MD925A
MD925AM
MD925AL
40
30
20
10
0.15
MD925A
MD925AM
Static
Pressure
0 31.5 63
125 250 500 1 k
1/3 Octave Band
2 k 4 k 8 k 16 k
Center Frequency [Hz]
0.05
MD925AL
0
0
E-52
Max. Air Flow
50
20
500
Speed
r/min
60
0.10
1000
Current
A
MD925A-12L
3500
Voltage
VDC
10
0.2
20
0.4
30
40
50
Air Flow [CFM]
0.6 0.8 1.0 1.2 1.4
Air Flow [m3/min]
System Configuration E-19
Accessories E-101
Cooling Fans
Dimensions
Scale 1/4, Unit = inch (mm)
Weight: 0.26 lb. (0.12 kg)
d E022
3.62 (92)
3.2480.012
(82.50.3)
ROTATION
Introduction
AIR FLOW
3.2480.012
(82.50.3)
1.00
(25.4)
Rotation
Air Flow
3.54 (90)
3.248 (82.5)
1
4.
)
3.248 (82.5)
0.177 (4.5) 4 Holes
0)
9
4(
5
3.
Intake side
Model
Safety Standards
Page
FG9D
E-102
FL9
✽1
FS9
E-107
Screen
)
E-105
✽1 These products have been designed to pass tests set forth under the UL and
CSA standards for equipment used in fans. They conform to the standards
only when used with an O.
✽2 Use M3 metric size screws to attach the filter to the fan frame.
● A filter or screen can be installed in place of the finger guard.
Before Using
a Fan
Finger Guard
Thermostats Accessories
✽ Alarm Type Only
Item
Finger Guard
Filter✽2
MFD
(
Accessories (Sold Separately)
MF
12 VDC or 24 VDC
Red
Black
GND
Orange
Alarm Output ✽
or Yellow
Orange: Alarm Type
Yellow: Pulse Sensor Type
MBD
Connection Diagram
Centrifugal Blowers
Cross Flow Fans
AC Input DC Input AC Input DC Input
MB
Outlet side
DC Input
06
0.177 (4.5) 4 Holes
Axial Flow Fans
AC Input
1
7(
Scale 1/4, Unit = inch (mm)
Long Life
MDE
MDS MD
3.54 (90)
3.248 (82.5)
MU
Panel Cut-Out
Variable
Flow
12
0. 169 (4.3)
4 Holes
)
(10
0)
(30
3.248 (82.5)
9
0.3
Alarm Lead (Orange)
(Alarm Type Only)
Pulse Sensor Lead (Yellow)
MRS
UL Style 1007 AWG24
Leads (Red,Black)
E-53
Cooling Fans
Ambient Temperature: 14˚F to 140˚F (10˚C to 60˚C)
Operating Voltage Range: 15%
MD Series
Materials
Frame: Resin
Flammability Grade: V-0
Blades: Resin
Flammability Grade: V-0
Overheat Protection: Built-in Overheat Protection Circuit
Bearings: Ball Bearings
3.15 in.1.00 in. thick
( 80 mm25.4 mm thick)
RrDC
Specifications
Model
Stall Alarm,
Electronic Alarm Type Pulse Sensor Type
q
o
Speed Type
Standard Speed
Middle Speed
Standard Type
MD825B-12S MD825B-12
12
0.25
MD825B-24L
MD825B-24S MD825B-24
MD825BM-12
MD825BM-24
24
0.14
12
0.15
24
0.09
12
0.07
●How to read the specifications➝Page E-13
●Pulse sensor type is not DEMKO approved.
MD825BL-12
●Alarm Specifications: q➝Page E-14, o➝Page E-16
60
2500
50
2000
40
1500
30
1000
20
500
10
0
0
Max. Static Pressure Noise Level
dB (A)
CFM
m3/min
inH2O
Pa
3800
35.3
1.00
0.196
49
35
2850
25.8
0.73
0.116
29
29
2100
19.4
0.55
0.0642
16
25
●Details of safety standards➝Page G-2
Frequency — Audible Noise Level (dB)
MD825B
MD825BM
MD825BL
50
MD825B
0.30
Speed
0.25
MD825BM
0.20
40
30
20
10
MD825BL
0
0.15
31.5 63 125 250 500 1 k
1/3 Octave Band
2k
4 k 8 k 16 k
Center Frequency [Hz]
MD825B
0.10
MD825BM
0.05
MD825BL
10
20
0
0
E-54
Max. Air Flow
Measured at a distance of 3.3 feet (1 m) from the fan intake side
Noise Level [dB]
3000
Speed
r/min
60
Static Pressure
[inH2O]
Speed [r/min]
Static Pressure
[Pa]
Air Flow — Static Pressure Characteristics
70
Current
A
MD825B-12L
Low Speed
3500
Voltage
VDC
0.2
0.4
Static
Pressure
30
40
50
Air Flow [CFM]
0.6 0.8 1.0 1.2 1.4
Air Flow [m3/min]
System Configuration E-19
Accessories E-101
Cooling Fans
Dimensions
Scale 1/4, Unit = inch (mm)
Weight: 0.24 lb. (0.11 kg)
d E023
3.15 (80)
2.8150.012
(71.50.3)
2.815 (71.5)
2.815 (71.5)
3
( 7
MB
Intake side
Accessories (Sold Separately)
Item
Safety Standards
Page
✽
E-102
Filter
FL8
E-105
Screen
FS8
E-107
(
)
✽ These products have been designed to pass tests set forth under the UL and
CSA standards for equipment used in fans. They conform to the standards only
when used with an O.
Finger Guard
Before Using
a Fan
● A filter or screen can be installed in place of the finger guard.
Thermostats Accessories
✽ Alarm Type Only
MFD
12 VDC or 24 VDC
Red
Black
GND
Orange
Alarm Output ✽
or Yellow
Orange: Alarm Type
Yellow: Pulse Sensor Type
MF
Model
FG8D
Finger Guard
MBD
Connection Diagram
Centrifugal Blowers
Cross Flow Fans
AC Input DC Input AC Input DC Input
Outlet side
8)
7
3.0
DC Input
9
(
0.177 (4.5)
4 Holes
Long Life
MDE
MDS MD
1)
8
.5
AIR FLOW
ROTATION
Scale 1/4, Unit = inch (mm)
0.177 (4.5)
4 Holes
2.815 (71.5)
MU
3.07 (78)
Axial Flow Fans
AC Input
Variable
Flow
Panel Cut-Out
3.07 (78)
0. 169 (4.3)
4 Holes
)
10
9 ( 0)
3
0. (30
12
Alarm Lead (Orange)
Pulse Sensor Lead (Yellow)
(Alarm Type Only)
2.815 (71.5)
Rotation
MRS
UL Style 1007 AWG24
Leads (Red,Black)
Air Flow
Introduction
2.8150.012
(71.50.3)
1.00
(25.4)
E-55
Cooling Fans
MD Series
Ambient Temperature: 14˚F to 140˚F (10˚C to 60˚C)
Operating Voltage Range: 15%
Materials
Frame: Resin
Flammability Grade: V-0
Blades: Resin
Flammability Grade: V-0
Overheat Protection: Built-in Overheat Protection Circuit
Bearings: Ball Bearings
2.44 in.1.00 in. thick
( 62 mm25.4 mm thick)
RrDC
Specifications
Model
Stall Alarm,
Electronic Alarm Type Pulse Sensor Type
q
o
Speed Type
Standard Speed
Middle Speed
Standard Type
MD625B-12S MD625B-12
12
0.16
MD625B-24L
MD625B-24S MD625B-24
MD625BM-12
MD625BM-24
24
0.10
12
0.10
24
0.07
●Alarm Specifications: q➝Page E-14, o➝Page E-16
50
4000
40
3000
30
2000
20
1000
10
0
0
Max. Air Flow
Max. Static Pressure Noise Level
dB (A)
CFM
m3/min
inH2O
Pa
4000
17.7
0.50
0.196
49
30
3000
13.1
0.37
0.109
27
25
●Details of safety standards➝Page G-2
Frequency — Audible Noise Level (dB)
60
MD625B
MD625BM
50
0.25
0.20
MD625B
0.15
MD625BM
Speed
MD625B
0.05
0
0
40
30
20
10
0
0.10
E-56
Speed
r/min
Measured at a distance of 3.3 feet (1 m) from the fan intake side
Noise Level [dB]
5000
Static Pressure
[inH2O]
Static Pressure
[Pa]
Speed [r/min]
Air Flow — Static Pressure Characteristics
60
Current
A
MD625B-12L
●How to read the specifications➝Page E-13
●Pulse sensor type is not DEMKO approved.
6000
Voltage
VDC
MD625BM
5
10
0.1
0.2
0.3
31.5 63 125 250 500 1 k
1/3 Octave Band
2k
4 k 8 k 16 k
Center Frequency [Hz]
Static
Pressure
15
20
25
Air Flow [CFM]
0.4 0.5 0.6 0.7
Air Flow [m3/min]
System Configuration E-19
Accessories E-101
Cooling Fans
Dimensions
Scale 1/4, Unit = inch (mm)
Weight: 0.22 lb. (0.1 kg)
d E024
2.44 (62)
1.9690.012
(500.3)
2.28 (58)
ROTATION
AIR FLOW
12 (300)
0.39 (10)
Outlet side
0.138 (3.5)
4 Holes
38
2. 0.5)
( 6
Intake side
Accessories (Sold Separately)
Filter
)
Model
Safety Standards
Page
FG6D
✽
E-102
FL6
E-105
✽ These products have been designed to pass tests set forth under the UL and
CSA standards for equipment used in fans. They conform to the standards only
when used with an O.
MFD
✽ (Alarm Type Only)
MF
(
Finger Guard
MBD
Item
12 VDC or 24 VDC
Red
Black
GND
Orange
Alarm Output ✽
or Yellow
Orange: Alarm Type
Yellow: Pulse Sensor Type
● A filter or screen can be installed in place of the finger guard.
Thermostats Accessories
Finger Guard
Centrifugal Blowers
Cross Flow Fans
AC Input DC Input AC Input DC Input
MB
Connection Diagram
DC Input
.56
2 65)
(
1.969 (50)
Long Life
MDE
MDS MD
1.969 (50)
1.969 (50)
Scale 1/4, Unit = inch (mm)
0.138 (3.5)
4 Holes
1.969 (50)
2.28 (58)
MU
Panel Cut-Out
Axial Flow Fans
AC Input
Variable
Flow
Alarm Lead (Orange)
Pulse Sensor Lead (Yellow)
(Alarm Type Only)
0. 146 (3.7)
4 Holes
MRS
UL Style 1007 AWG24
Leads (Red,Black)
Air Flow
Rotation
Introduction
1.9690.012
(500.3)
1.00
(25.4)
Before Using
a Fan
E-57
Cooling Fans
Ambient Temperature: 14˚F to 140˚F (10˚C to 60˚C)
Operating Voltage Range: 10%
MDS Series
High-Performance Models
Materials
Frame: Resin
Flammability Grade: V-0
Blades: Resin
Flammability Grade: V-0
Overheat Protection: Built-in Overheat Protection Circuit
Bearings: Ball Bearings
2.05 in.0.39 in. thick
( 52 mm10 mm thick)
RrDC
Specifications
Model
Electronic Alarm Type Standard Type
q
MDS510-12L MDS510-12
Standard Speed
MDS510-24L MDS510-24
Middle Speed
Voltage
Current
Speed
Max. Air Flow
VDC
A
r/min
CFM
m3/min
inH2O
Pa
dB(A)
12
0.14
24
0.08
7000
9.53
0.27
0.217
54
36
5500
7.06
0.2
0.129
32
30
—
MDS510M-5
5
0.2
—
MDS510M-12
12
0.12
—
MDS510M-24
24
0.06
●How to read the specifications➝Page E-13
●Alarm Specifications: q➝Page E-14
7000
80
60
5000
50
4000
40
3000
30
2000
20
1000
10
0
0
MDS510
0.30
Speed
0.25
MDS510M
MDS510
MDS510M
40
30
20
0.20
10
0.15
0
MDS510 Static
Pressure
0.10
31.5 63 125 250 500 1 k
1/3 Octave Band
2 k 4 k 8 k 16 k
Center Frequency [Hz]
0.05
MDS510M
0
0
E-58
Frequency — Audible Noise Level (dB)
Measured at a distance of 3.3 feet (1 m) from the fan intake side
50
70
6000
Noise Level
60
Static Pressure
[inH2O]
8000
Static Pressure
[Pa]
Speed
[r/min]
Air Flow — Static Pressure Characteristics
Max. Static Pressure
●Details of safety standards➝Page G-2
Noise Level [dB]
Speed Type
2.0
4.0
6.0
8.0
10.0
Air Flow [CFM]
0.04 0.08 0.12 0.16 0.20 0.24 0.28
Air Flow [m3/min]
System Configuration E-19
Accessories E-101
Cooling Fans
Dimensions
Scale 1/2, Unit = inch (mm)
Weight: 1.1 oz. (30 g)
d E018
2.05 (52)
Air Flow
0.157 (4) 4 Holes
Accessories (Sold Separately)
Item
Model
Safety Standards
Page
FG5D
✽
E-102
Thermostats Accessories
Finger Guard
MFD
✽ These products have been designed to pass tests set forth under the UL and
CSA standards for equipment used in fans. They conform to the standards only
when used with an O.
MF
Finger Guard
5 VDC, 12 VDC or 24 VDC
Red
Black
GND
Orange
Alarm Output
(Alarm Type Only)
MBD
Connection Diagram
Centrifugal Blowers
Cross Flow Fans
AC Input DC Input AC Input DC Input
MB
Outlet side/Intake side
DC Input
Long Life
MDE
MDS MD
85
1. 7)
( 4
Axial Flow Fans
AC Input
Scale 1/2, Unit = inch (mm)
MU
1.654 (42)
0. 146 (3.7) 4 Holes
Variable
Flow
12
(300)
Panel Cut-Out
1.654 (42)
Rotation
MRS
0.39
(10)
Introduction
UL Style 1007 AWG26
Leads (Red,Black)
Alarm Lead (Orange)
(Alarm Type Only)
1.6540.012
(420.3)
1.6540.012
(420.3)
0.39
(10)
Before Using
a Fan
E-59
Cooling Fans
Ambient Temperature: 14˚F to 140˚F (10˚C to 60˚C)
Operating Voltage Range: 10%
MDS Series
High-Performance Models
Materials
Frame: Resin
Flammability Grade: V-0
Blades: Resin
Flammability Grade: V-0
Overheat Protection: Built-in Overheat Protection Circuit
Bearings: Ball Bearings
1.65 in.0.39 in. thick
( 42 mm10 mm thick)
RrDC
Specifications
Model
Voltage
Current
Speed
Max. Air Flow
VDC
A
r/min
CFM
m3/min
inH2O
Pa
dB(A)
MDS410-12L MDS410-12
12
0.16
MDS410-24L MDS410-24
24
0.09
10000
6.35
0.18
0.345
86
34
5
0.2
7500
4.59
0.13
0.188
47
29
Electronic Alarm Type Standard Type
Speed Type
q
Standard Speed
Middle Speed
MDS410M-5
—
●How to read the specifications➝Page E-13
●Alarm Specifications: q➝Page E-14
10000
100
8000
80
6000
60
4000
40
2000
20
0
0
MD410
MD410M
0.6
0.5
MDS410
0.4
0.3
30
20
10
Speed
MDS410M
40
0
31.5 63
0.2
MDS410
0.1
MDS410M
4.0
2.0
0
6.0
8 k 16 k
0.04 0.08 0.12 0.16 0.20 0.24 0.28
Air Flow [m3/min]
Dimensions
Panel Cut-Out
Scale 1/2, Unit = inch (mm)
0.15 (3.8)
2 Holes
Scale 1/2, Unit = inch (mm)
1.26 (32)
1.26 (32)
0.138 (3.5) 2 Holes
1.260.012
(320.3)
1.260.012
(320.3)
4k
Center Frequency [Hz]
8.0
10.0
Air Flow [CFM]
Weight: 1.1 oz. (30 g)
d E019
1.65 (42)
2k
Static
Pressure
0.39
(10)
1.26 (32)
0
125 250 500 1 k
1/3 Octave Band
46
1. )
7
( 3
1.26 (32)
120
Frequency — Audible Noise Level (dB)
Measured at a distance of 3.3 feet (1 m) from the fan intake side
50
140
12000
●Details of safety standards➝Page G-2
Noise Level [dB]
14000
160
Noise Level
60
Static Pressure
[inH2O]
16000
Static Pressure
[Pa]
Speed
[r/min]
Air Flow — Static Pressure Characteristics
Max. Static Pressure
46
1. )
7
( 3
12 (300)
0.39 (10)
Rotation
0.15 (3.8) 2 Holes
Air Flow
Outlet side
UL Style 1007 AWG26
Leads (Red,Black)
Alarm Lead (Orange)
(Alarm Type Only)
Connection Diagram
5 VDC, 12 VDC or 24 VDC
Red
Black
GND
Orange
Alarm Output
(Alarm Type Only)
Intake side
Accessories (Sold Separately)
Item
Finger Guard
Model
Safety Standards
Page
FG4D
✽
E-102
✽ These products have been designed to pass tests set forth under the UL and
CSA standards for equipment used in fans. They conform to the standards only
when used with an O.
Finger Guard
E-60
System Configuration E-19
Accessories E-101