Product Overview

1” - angle, mounting brackets are slotted to accommodate joists
on 16” or 24” centerlines.
Top and Bottom 1" 1"
Access Side 1" 18"
Non-Access Side 1" 1"
Rear 18" 18"
Vent Connector 4" 4"
30 45 60 75 100 125
30,000 45,000 60,000 75,000 100,000 125,000
24,000 36,000 48,000 60,000 80,000 100,000
505 720 990 1,160 1,490 1,980
523 749 653 769 565 747
44 46 45 48 50 47
10 10 12 14 12 16
25 27 36 38 42 56
1/15 1/15 1/12 1/12 1/12 1/8
1,550 1,550 1,625 1,625 1,050 1,550
S.P. S.P. P.S.C. P.S.C. S.P. P.S.C.
2.4 2.4 1.2 1.2 2.7 2.2
3.7 3.7 2.5 2.5 4.7 4.2
* 3" for Model HD, 4" for Model HDS
Model Size
Btu/Hr Input
Btu/Hr Output
Entering Airflow (CFM)
Outlet Velocity
Air Temp. Rise (°F)
Mounting Height (Max ft.)
Heat Throw (ft.)
Unit Total Amps
3/4* 3/4* 4
Vent Connector Size (in.)
Performance
Horsepower
RPM
Type
Amps
Motor
Data
Mounting
Clearances
Unit Side
Clearance To
Combustible Materials
Recommended
Service Clearance
SIZES
30-75
SIZES
100/125
(ACCESSORY)
.00
1.10 3.10 5.10 7.10 9.10
17.10 19.10 21.10
23.10 25.10 26.20
.00
1.50 3.50 5.50 7.50 9.50
11.50 13.50 21.50 23.50 25.50 27.50 29.50 31.50 33.50 35.00
30 45 60 75 100/125
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
7.25 7.25 10.75 10.75 14.0
18.5 18.5 18.5 18.5 24.0
7.6 7.6 7.835 7.835 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
2.74 2.74 3.15 3.15 3.87
3.19 3.19 5.55 5.55 10.73
10 10 14 14 18.0
55 60 80 85 125
Model Size
A
B
C
D
E
F
G
H
Gas Connection
I
J
K (HDS only)
L (HDS only)
Fan Diameter
Approx. Shipping Weight (lbs.)
Dimensions (inches)
Control Options
Control Description
Control Service Thermostat Type of Model
Code No. Voltage Voltage Gas Size
Single-Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry 11 115V 24V natural 30-125
- Utilizes a single-stage combination gas control with ignition control.
Gas is lit with a direct spark igniter on call for heat.
21 115V 24V propane 30-125
Two-Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry 12 115V 24V natural 75-125
- Utilizes a two-stage combination gas control with built-in ignition control.
Firing rate is 100% and 50% of full rated input. Gas is lit with a direct spark
22 115V 24V propane 75-125
igniter on call for heat.
COMBUSTION AIR
LOUVERS (HD ONLY)
3 3
3 3
4 4 4
Combustion Air Inlet Connector
Size (Model HDS only) (in.)
Power-Exhausted and Separated-Combustion,
Gas-Fired Unit Heater Specifications