Draft Inducers

Field Draft Inducers solve the drafting problems caused by short chimneys, undersized vent pipes and negative building pressures.

Draft Inducers are designed for easy installation in a wide variety of applications, including oil or gas-fired furnaces, water heaters, and boilers. For venting single or multiple appliances, use a control kit.


When to use a Draft Inducer

• Long horizontal vent runs
• Undersized vent pipes
• Short chimneys
• Outside exposed chimney

How Draft Inducers Work

1. Thermostat calls for heat.
2. Control Kit (A) energizes Draft Inducer (B).
3. Draft Inducer forces air flow in chimney, creating negative pressure in burner chamber.
4. Once negative pressure (draft) is established, the Control Kit allows the burner (C) to start.
5. When the thermostat is satisfied, the Control Kit shuts down the burner and the Draft Inducer.

 

 

Sizing Chart
Gas-Firing with Draft Hood Gas-Firing with Barometric Draft Control Oil or Coal-Firing with Barometric Draft Control
Input (BTU/HR) Pipe Dia. (IN) Draft Inducer (Model) Static Pressure (IN W.C.) Flow (CFM) Input (BTU/HR) Pipe Dia. (IN) Draft Inducer (Model) Static Pressure (IN W.C.) Flow (CFM) Max. Input per GPH Pipe Dia. (IN) Draft Inducer (Model) Static Pressure (IN W.C.) Flow (CFM)
69,000
105,000
111,000
120,000
3
4
5
6
DI-1 .04
.04
.06
.05
47
72
75
82
69,000
105,000
118,000
123,000
3
4
5
6
DI-1 .05
.05
.06
.05
36
55
65
68
.5
.7
.9
.95
3
4
5
6
DI-1 .05
.05
.05
.04
36
48
67
68
279,000
308,000
330,000
353,000
5
6
7
8
DI-2
.06
.07
.11
.07
190
210
225
240
300,000
340,000
364,000
390,000
5
6
7
8
DI-2
.07
.08
.09
.06
156
176
189
200
2
2.5
2.75
3
5
6
7
8
DI-2 .06
.07
.08
.05
156
175
200
215
522,000
674,000
694,000
835,000
8
9
10
12
DI-3 .18
.15
.12
.08
355
458
472
568
683,000
880,000
908,000
1,092,000
8
9
10
12
DI-3 .15
.13
.10
.06
355
458
472
568
5
6
6.5
7.5
8
9
10
12
DI-3 .13
.11
.09
.06
355
458
472
568
900,000
1,250,000
1,400,000
1,800,000
10
12
14
16
DI-4 .18
.20
.19
.15
612
850
952
1,224
1,177,000
1,635,000
1,831,000
2,300,000
10
12
14
16
DI-4 .15
.17
.16
.13
612
850
952
1,224
8.5
11
13
17
10
12
14
16
DI-4 .13
.14
.13
.10
612
850
952
1,224
2,000,000
2,200,000
2,400,000
2,800,000
14
16
18
20
DI-5 .14
.18
.10
.09
1,224
1,500
1,632
1,900
2,350,000
2,885,000
3,140,000
3,654,000
14
16
18
20
DI-5 .12
.15
.09
.08
1,224
1,500
1,632
1,900
17
21
22
26
14
16
18
20
DI-5 .10
.13
.07
.06
1,224
1,500
1,632
1,900


Note: Pressure switch required according to NFPA code.
Not for sidewall venting.


Specifications
Unit Dimensions (inches) Electrical Data
Model L W D X Y Volts Hz RPM Watts Amps Thermal Protection
DI-1 8 3/32 8 13/16 5 17/32 2 5/8 7 115 60 1550 33 .43 yes
DI-2 9 7/16 9 3/16 6 7/16 3 8 3/8 115 60 1550 78 1.1 yes
DI-3 12 9/16 10 1/8 9 3 3/4 11 3/4 115 60 1725 186 3.9 yes
DI-4 12 9/16 14 3/16 9 7 11 3/4 115 60 1725 440 5.0 yes
DI-5 12 9/16 16 3/16 9 9 11 3/4 115 60 1725 560 5.7 yes

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