Model HDS Hot-Dawg Separated Combustion Unit Heaters: The separated combustion Hot Dawg draws its combustion air from outside to ensure that the unit will always have plenty of fresh, clean air to breath. This fresh-air supply reduces common concerns about dusty, dirty or humid applications. In
Model HDS Hot-Dawg Separated Combustion Unit Heaters: The separated combustion Hot Dawg draws its combustion air from outside to ensure that the unit will always have plenty of fresh, clean air to breath. This fresh-air supply reduces common concerns about dusty, dirty or humid applications. In addition, by drawing the combustion air from the outside, the overall heating efficiency is increased.
100% Outside Air for Combustion
Sealed Compartment Protects Combination Gas Control
Manifold and Burner
Horizontal or Vertical Concentric Venting
80% Thermal Efficiency
Field Convertible to Propane
100% Shut-Off with Continuous Retry
Less maintenance in dusty environments.
Improved efficiency by using outside air for combustion.
Greater durability in "hostile" environments (environments possessing substances that may deteriorate the performance of the unit).
External thermostat and gas connections.
Hush-puppy quiet operation.
Uses natural or propane gas.
Certified for residential, commercial and industrial use.
Low-profile design and neutral color to blend in with decor.
Lightweight, easily installs 1" from ceiling with only 2 angle brackets (included).
Install quickly and easily with field wiring connections and knockouts for quick access to gas and electricity.
Standard power exhaust simplifies side-wall or roof venting with small-diameter vent pipe.
Versatile design allows for right or left hand controls and installation. Gas, electrical and flue connections can be changed from one side to the other by simply flipping the Hot Dawg over.
Permanently-lubricated motor for trouble-gree dependability.
*Do not locate any gas-fired unit in areas with chlorinated, halogenated or acidic vapors in atmosphere.
Many of our customers happily report that purchasing a Hot Dawg heater from the Greenhouse Megastore helped them save 50% or more off the unit price received from a local HVAC installer. However, for safety reasons and to minimize installation problems Modine strongly recommends having a licensed HVAC technician install your Hot Dawg heater. Although we are happy to offer limited technical support for your Hot Dawg purchase, we can NOT install the heater for you over the phone nor are we able to troubleshoot problems you may experience if you choose to install the heater yourself. By purchasing this heater from us, you accept sole responsibility for installation and agree to abide by Modine's limited Warranty
Modine HD-Series vs. Sterling RF-Series
30 - 125 MBH
30 - 90 MBH
Modine covers more applications
Same non-condensing high efficiency
Blower Fan Units (HDB model only)
60 - 125 MBH
Modine covers more applications
Modine units will look better longer
Quiet Swept Wing Fans
100 and 125 MBH
Larger Modine units are quieter
Heat Exchanger Gauge
Modine heat exchangers are heavier gauge
Optional Stainless Steel
Modine covers more applications for corrosive environments
T.E. Fan Motor Standard
Modine motors are protected for longer life
Power Vented X-Changer Warranty (HDS and HDC models only)
Same 10 year heat exchanger warranty
Sep. Comb. X Changer Warranty (HDS & HDC models only
Modine separated combustion units warrantied longer
Modine offers a 10 year limited warranty on the heat exchanger and a 2 year limited warranty on all other components. Please note this warranty covers parts only and does not cover any labor costs associated with repairing the heater. View Warranty (PDF)
Heater Warranty and Return Policy
It is the customer's responsibility to carefully inspect heaters for damage before accepting delivery since heaters are usually not returnable once delivery is accepted. Obviously damaged heaters should be refused and Greenhouse Megastore customer service contacted to make arrangements for a replacement unit. Once delivery is accepted Greenhouse Megastore will gladly provide replacement parts under the manufacturer's warranty to repair damaged or defective heaters; however this warranty does not include any labor costs associated with installing these parts. Warranty issues should be diagnosed by a certified HVAC technician since parts deemed not to be defective by the manufacturer are not available for credit back to the customer. Specific warranty policies vary by manufacturer but typically cover replacement parts as indicated above up to one year after purchase. Please contact Greenhouse Megastore customer service if you have any questions about the warranty for your specific heater.