Install Instructions
16
6-583.4
MOUNTING 
BRACKET 
SIZE 30-75
REAR VIEW
ACCESS VIEW
ELECTRICAL 
CONNECTION
POWER VENTER 
VENT PIPE 
CONNECTION
GAS
CONNECTION
ADJUSTABLE 
LOUVERS
14.9" BETWEEN 3/8"-16 MOUNTING HOLES 
(MODEL SIZES 100 AND 125 ONLY)
MOUNTING HOLES TYP 
3/8 x 1" LONG
13.5" BETWEEN 3/8"-16 MOUNTING HOLES 
(MODEL SIZES 100 AND 125 ONLY)
ACCESS
PANEL
 H 
 B 
 1.00 
    A  
 F 
 J 
 I 
D OPENING
C
 3.5"
 G
E
OPENING
 10"
Mounting brackets are slotted to accomodate 
joists on 16" or 24" centerlines.
HD/HDB 
100/125 
(Accessory)
HD/HDB 
30-75
.00
1.50
3.50
5.50
7.50
9.50
25.50
27.50
29.50
31.50
33.50
35.00
26.20
25.10
23.10
21.10
19.10
17.10
9.10
7.10
5.10
3.10
1.10
.00
Mounting
Propeller Units - Model HD
Figure 16.1 - Dimensional Drawings - Model HD
Figure 16.2 - Dimensional Drawings - Model HDB
Blower Units - Model HDB
Table 16.1 - Dimensions (inches) - HD
Table 16.3 - Clearance to Combustibles, Model HD/HDB
REAR VIEW
ACCESS VIEW
GAS 
CONNECTION
ELECTRICAL
CONNECTIONS
ACCESS
PANEL
 B
 1.0"
D OPENING
 H
 F
MOUNTING 
BRACKETS 
SIZE 30-75
POWER VENTER
VENT PIPE 
CONNECTION
  A
 I
 J
 C
 E
OPENING
ADJUSTABLE
LOUVERS
MOUNTING HOLES TYP
3/8 X 1" LONG
 G
14.9" BETWEEN 3/8"-16 MOUNTING HOLES
(MODEL SIZES 100 AND 125 ONLY)
14.9" BETWEEN 3/8"-16 MOUNTING HOLES
(MODEL SIZES 100 AND 125 ONLY)
 3.5"
 10.0"
Table 16.2 - Dimensions (inches) - HDB
  HD30  HD45  HD60  HD75  HD100/125 
  26.8  26.8  26.8  26.8  35.5
  12.2  12.2  18.0  18.0  20.5
  16.5  16.5  16.5  16.5  22.0
  14.9  14.9  14.9  14.9  22.5
  10.1  10.1  15.9  15.9  18.4
  7.5  7.5  10.7  10.7  14.0
  18.5  18.5  18.5  18.5  -
  7.6  7.6  7.8  7.8  8.4
  1/2  1/2  1/2  1/2  1/2
  34.5  34.5  34.5  34.5  43.0
  22  22  25  25  31.0
  10  10  14  14  18.0
  55  60  80  85  125
  3  3  3  3  4
Models
A
B
C
D
E
F
G
H
Gas Connection
I
J
Fan Diameter
Approx. Shipping Weight (lbs.)
Vent Connector Size (in)
  HDB 60  HDB 75  HDB100/125
  26.8  26.8  35.5
  18.0  18.0  20.5
  16.5  16.5  22.0
  14.9  14.9  22.5
  15.9  15.9  18.4
  10.7  10.7  14.0
  18.5  18.5  -
  7.8  7.8  8.4
   1/2   1/2   1/2
  34.5  34.5  44.5
  25.0  25.0  41.5
   9 - 7   9 - 7   10 - 10
  92  97  151
  3  3  4
Models
A 
B
C
D
E
F
G
H
Gas Connection
I
J
Blower
Approx.Shipping Weight (lbs.)
Vent Connector Size (in)
Unit Side
  Clearance To  Recommended
    Combustible Materials  Service Clearance
  Top and Bottom  1"  1"
  Access Side  1"  18"
  Non-Access Side  1"  1"
  Rear  18"  18"
  Vent Connector  4"  4"
DIMENSIONAL DATA - MODEL HD/HDB










