garage, workspace and outbuilding heaters
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HOT DAWG™ POWER-EXHAUSTED, GAS-FIRED UNIT HEATER (MODEL HD)• Quiet operation allows your space to be warm
without the distraction of a loud machine runningin the background
• Unit can easily be rotated to allow for convenientright or left side control placement**
• Fuel type: Natural or propane gas
• Low-profile, lightweight design easily installs1” from ceiling with only two angle brackets*
• Casing construction made of heavy gauge metal
• Full 10-year warranty on heat exchanger
HOT DAWG™ H2O LOW PROFILE HOT WATER UNIT HEATER (MODEL HHD)• Low-profile design with flexible mounting options (parallel, perpendicular or recessed
between joists) allows for horizontal or vertical air delivery
• No external moving parts - twin centrifugal blowers keep all moving parts inside the cabinet
• Side panel air inlet opening have factory installed finger guards
• Constructed of heavy gauge steel for long lasting durability
• Includes two mounting brackets with vibration isolators to reduce noise and vibration
• Internal coil can handle water pressures up to 150 PSI and temperatures up to 200°F
Hot Dawg H20 Applications*
Model Sizes Airflow (CFM) GPM 140° F BTU/hr 180° F BTU/hr Application
HHD 30 405 405
24
20,600 24,200
30,90036,300 1 to 2 car garage
HHD 45 (high speed) 710 710
24
29,900 35,100
44,80052,700 2 to 3 car garage
HHD 45 (low speed) 425 425
24
20,700 24,400
31,10036,600 2 to 3 car garage
• Permanently-lubricated motor formaintenance-free dependability
• Single- or two-stage controls available
• Direct spark ignition for reliable andconsistent ignition
• 100% shut-off with continuous retry to allowfor safe ignition in the event the unit doesn’tlight on the first try
• Factory installed finger proof fan guards
• Blower models (HDB) available
HOT DAWG™ SEPARATED COMBUSTION GAS-FIRED UNIT HEATER (MODEL HDS)Experience the same great features as the HD, with these added benefits:
• Blower models (HDB) available
• Draws fresh air from outside, ensuringdust, dirt or fumes do not affect durabilityor performance
• Factory assembled, certified separatedcombustion. No add-ons needed allow foran easier and quicker installation providinggreater durability and reduced maintenance
* Sizing data for sample only. Consult a qualified installer for the actual requirements for your building.
* Included on sizes 30-75, accessory for 100, 125** For model sizes 30-75
YEAR-ROUND COMFORT TO WORK, PLAY AND RELAX
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 Air�ow (CFM)
Outlet Velocity
Air Temp. Rise (°F)
Mounting Height (Max ft.)
Heat Throw (ft.)
Unit Total Amps
3/4* 3/4* 4Vent Connector Size (in.)
Performance
Horsepower
RPM
Type
Amps
MotorData
Mounting
Clearances
Unit Side ClearanceToCombustible Materials
RecommendedService Clearance
SIZES30-75
SIZES100/125
(ACCESSORY)
.00
1.10
3.10
5.10
7.10
9.10
17.1
0
19.1
0
21.1
0
23.1
0
25.1
026
.20
.00
1.50
3.50
5.50
7.50
9.50
11.5
0
13.5
0
21.5
0
23.5
0
25.5
0
27.5
0
29.5
0
31.5
0
33.5
035
.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 DescriptionControl 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 75-125igniter on call for heat.
3 3
3 3
4 4 4Combustion Air Inlet Connector
Size (Model HDS only) (in.)
B
A
C (APPROX.)
ELECTRICAL CONNECTIONS(MODEL HD)
ELECTRICAL CONNECTIONS(MODEL HDS)
REAR VIEW
POWER VENTERVENT PIPE CONNECTION
ADJUSTABLELOUVERS
SIGHT GLASS(HDS ONLY)
MOUNTING HOLES TYP3/8 X 1” LONG
COMBUSTION AIRLOUVERS (HD ONLY)
MOUNTINGBRACKETS
ACCESSPANEL
COMBUSTION AIRINLET CONNECTION(MODEL HDS)
GAS CONNECTION1.00
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 Air�ow (CFM)
Outlet Velocity
Air Temp. Rise (°F)
Mounting Height (Max ft.)
Heat Throw (ft.)
Unit Total Amps
3/4* 3/4* 4Vent Connector Size (in.)
Performance
Horsepower
RPM
Type
Amps
MotorData
Mounting
Clearances
Unit Side ClearanceToCombustible Materials
RecommendedService Clearance
SIZES30-75
SIZES100/125
(ACCESSORY)
.00
1.10
3.10
5.10
7.10
9.10
17.1
0
19.1
0
21.1
0
23.1
0
25.1
026
.20
.00
1.50
3.50
5.50
7.50
9.50
11.5
0
13.5
0
21.5
0
23.5
0
25.5
0
27.5
0
29.5
0
31.5
0
33.5
035
.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 DescriptionControl 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 75-125igniter on call for heat.
3 3
3 3
4 4 4Combustion Air Inlet Connector
Size (Model HDS only) (in.)
B
A
C (APPROX.)
ELECTRICAL CONNECTIONS(MODEL HD)
ELECTRICAL CONNECTIONS(MODEL HDS)
REAR VIEW
POWER VENTERVENT PIPE CONNECTION
ADJUSTABLELOUVERS
SIGHT GLASS(HDS ONLY)
MOUNTING HOLES TYP3/8 X 1” LONG
COMBUSTION AIRLOUVERS (HD ONLY)
MOUNTINGBRACKETS
ACCESSPANEL
COMBUSTION AIRINLET CONNECTION(MODEL HDS)
GAS CONNECTION1.00
Hot Dawg Applications*
Model BTU/Hr Input Typical Application
HD/HDS 30 30,000 1 to 1-1/2 Car Garage
HD/HDS 45 45,000 2 to 2-1/2 Car Garage
HD/HDS 60 60,000 3 to 3-1/2 Car Garage
HD/HDS 75, 100, 125 75,000-125,000 Large Garage
Performance Data - Model HD/HDS
Model Size 30 45 60 75 100 125
BTU/Hr Input* 30,000 45,000 60,000 75,000 100,000 125,000
BTU/Hr Output* 24,600 36,900 49,200 61,500 82,000 102,500
Entering Airflow (CFM)** 505 720 990 1,160 1,490 1,980
Outlet Velocity (FPM)** 523 725 653 769 565 747
Air Temp. Rise (ºF) 44 46 45 48 50 47
Mounting Height (Max ft.)** 10 10 12 14 12 16
Heat Throw (ft.) 25 27 36 38 42 56
Dimensions (inches) - Model HD/HDS
Model Size 30 45 60 75 100/125
A (length) 26.8 26.8 26.8 26.8 35.5
B (height) 12.2 12.2 18.0 18.0 20.5
C (depth) 22.0 22.0 25.0 25.0 31.0
Gas Connection 1/2 1/2 1/2 1/2 1/2
Vent Connection 3 3 3 3* / 4** 3* / 4**
Approx. Shipping Weight (lbs.) 55 60 80 85 125
Clearances for Residentially-Certified Unit Heaters
Unit Side Clearance To Combustible Materials
Recommended Service Clearance
Top and Bottom 1” 18”
Access Side 1” 18”
Non-Access Side 1” 18”
Rear 18” 18”
Vent Connector 3”* / 4”** —
Ratings shown are for elevations up to 2,000 ft. For elevations above 2,000 feet, ratings should be reduced at the rate of 4% for each 1,000 feet above sea level. (In Canada see rating plate) Reduction of rating requires use of a high altitude kit.
Data taken at 55°F air temperature rise. At 65°F ambient and unit fired at full-rated input. Mounting height as measured from bottom of unit, and without deflector hoods.
Horizontal air delivery; perpendicular to joists
Vertical air delivery; recessed between joists
Horizontal air delivery; parallel to joists
Hot Dawg H2O Mounting Flexibility
* Sizing data for sample only. Consult a qualified installer for the actual requirements for your building.
* Measured at distance from unit shown. ** Competitor published data.
* HD30, HD45, HD60, HD75** HD100, D125
* HD30, HD45, HD60, HD75** HD100, D125
YEAR-ROUND COMFORT TO WORK, PLAY AND RELAX
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