HEATING SOLUTIONS
GARAGE, WORKSPACE AND OUTBUILDING HEATERS
YEAR-ROUND COMFORT TO WORK, PLAY AND RELAX
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 running
in the background
• Unit can easily be rotated to allow for convenient
right or left side control placement**
• Fuel type: Natural or propane gas
• Low-profile, lightweight design easily installs
1” from ceiling with only two angle brackets*
• Casing construction made of heavy gauge metal
• Full 10-year warranty on heat exchanger
* Included on size s 30-75, accessor y for 100, 125
** For model sizes 30-75
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, ensuring
dust, dirt or fumes do not affect durability
or performance
• Permanently-lubricated motor for
maintenance-free dependability
• Single- or two-stage controls available
• Direct spark ignition for reliable and
consistent ignition
• 100% shut-off with continuous retry to allow
for safe ignition in the event the unit doesn’t
light on the first try
• Factory installed finger proof fan guards
• Blower models (HDB) available
• Factory assembled, certified separated
combustion. No add-ons needed allow for
an easier and quicker installation providing
greater durability and reduced maintenance
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
HHD 30
HHD 45 (high speed)
HHD 45 (low speed)
* Sizing data for sample only. Consult a qualified installer for the actual requirements for your building.
Airflow
(CFM)
405
405
710
710
425
425
GPM 140° F BTU/hr 180° F BTU/hr Application
2
4
2
4
2
4
20,600
24,200
29,900
35,100
20,700
24,400
30,900
36,300
44,800
52,700
31,100
36,600
1 to 2 car garage
2 to 3 car garage
2 to 3 car garage
B
A
C (APPROX.)
ELECTRICAL CONNECTIONS
(MODEL HD)
ELECTRICAL CONNECTIONS
(MODEL HDS)
POWER VENTER
VENT PIPE CONNECTION
ADJUSTABLE
LOUVERS
SIGHT GLASS
(HDS ONLY)
MOUNTING HOLES TYP
3/8 X 1” LONG
COMBUSTION AIR
LOUVERS (HD ONLY)
MOUNTING
BRACKETS
ACCESS
PANEL
COMBUSTION AIR
INLET CONNECTION
(MODEL HDS)
GAS CONNECTION
1.00
B
A
ELECTRICAL CONNECTIONS
(MODEL HD)
ELECTRICAL CONNECTIONS
(MODEL HDS)
REAR VIEW
POWER VENTER
VENT PIPE CONNECTION
MOUNTING
BRACKETS
ACCESS
PANEL
COMBUSTION AIR
INLET CONNECTION
(MODEL HDS)
GAS CONNECTION
1.00
Dimensions (inches) - Model HD/HDS
Performance Data - Model HD/HDS
Model Size 30 45 60 75 100 /125
A (length) 26.8 26.8 26.8 26.8 35.5
B (heigh t) 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
Approx. Shipping
Weight ( lbs.)
* H D30, HD45, HD60, H D75
** H D100, D1 25
55 60 80 85 125
**
/ 4
Clearances for Residentially-Certified Unit Heaters
Unit Side
Clearance To Combustible
Materials
Top and Bottom 1” 18”
Access Side 1” 18”
Non-Access Side 1” 18”
Rear 18” 18”
Recommended Service
Clearance
3* / 4
Model Size 30 45 60 75 10 0 125
BTU/Hr Input
BTU/Hr Output
Entering Air flow (CFM)
Outlet Velocity
Air Temp. Rise (º F) 44 46 45 48 50 47
**
Mounting Height ( Max ft.)
Heat Throw (ft.) 25 27 36 38 42 56
* M easured at distance from unit shown.
** Competitor published data.
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
(FPM)
*
30,000 45,000 60,000 75,000 100,000 125,000
*
24,600 36,900 49,200 61,500 82,000 102,500
**
505 720 990 1,160 1,490 1,98 0
**
523 725 653 769 565 747
**
10 10 12 14 12 16
*
Vent Connector 3”* / 4”** —
* H D30, HD45, HD60, H D75
** H D100, D1 25
Hot Dawg H2O Mounting Flexibility
Horizontal air delivery; perpendicular to joists
Vertical air delivery; recessed between joists
HD/ HDS 75, 100, 125 75,000-125,000 Large Garage
* Sizing data for sample only. Consult a qualified installer for the actual requirements for your building.
Horizontal air delivery; parallel to joists
Ratings shown are for elevatio ns up to 2,000 f t. For elevations above 2,000 fee t, ratings should be reduce d at the rate of 4% for each 1,00 0 feet above sea level.
(In Canada se e rating plate) Reduction of r ating require s use of a high altitud e kit.
Data taken at 55°F air temperatur e rise. At 65°F ambient and unit fir ed at full-rated input. Mo unting height as measured from b ottom of unit, and without deflec tor hoods.
Modine Manufacturing Company
1500 DeKoven Avenue
Racine, Wisconsin 53403-2552
1.800.828.HEAT
www.ModineHVAC.com
©2018 Modine Manufacturing Co. 6-114.10
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