Modine HHD45S01
Modine HHD45S01
Hover to zoom
1 Of 5

Modine Hot Dawg HHD - 45,000 BTU - Hot Water Unit Heater - Low Profile - Horizontal - Copper Heat Exchanger



Write A Review
Free Shipping
Lift Gate
  Learn More About Free Freight
Free Shipping & Lift Gate
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
Ships in 6-8 Weeks
synchrony card logo
$236 / Month
Suggested monthly payments with 6 month financing.
Modine Hot Dawg HHD - 45,000 BTU - Hot Water Unit Heater - Low Profile - Horizontal - Copper Heat Exchanger
Modine Hot Dawg HHD - 45,000 BTU - Hot Water Unit Heater - Low Profile - Horizontal - Copper Heat Exchanger
Model: HHD45S01
Product Q&A
How-To Articles

Recommended Accessories

eComfort expert image
Expert Recommended Accessories Selected by Ken, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10


    Modine's new HHD45 hot water unit heater packs all the utility of a standard hot water unit heater into one of the smallest packages on the market. The HHD45 has no external moving parts, making it a safe investment for any homeowner even if children are present. The low profile design allows the unit heater to be installed into an incredible variety of places, and the high grade stainless steel casing gives the HHD45 the durability it needs to last for decades. These features combined with an internal coil that can handle very high temperatures makes the HHD45 a solid investment for any home.
  • Hush-Puppy Quiet Operation
  • The HHD45 is incredibly quiet during operation. This allows the heater to be inconspicuous yet effective at all times - it will not distract you from your work.
  • Low Profile Design
  • The HHD45 has an incredibly low profile design, measuring in at a height of only 11.46 inches. It can be mounted with a one inch clearance from the ceiling on only two angle brackets, keeping the unit heater out of your way.
  • Durable Casing
  • The HHD45 uses heavy gauge steel for its casing, giving it incredible durability and the means to last for years.
  • No External Moving Parts
  • This unit heater contains no external moving parts, instead using twin internal centrifugal blowers for air movement. This makes the HHD45 incredibly safe during operation, with little to no risk of objects or debris interfering with fan movement.
  • Integrates Easily Into Hydronic Systems
  • The mounting versatility of the HHD45 allows it to be easily integrated into an already existing hydronic pipe network. The internal coil's high tolerance for temperature and pressure make it compatible with a large variety of hydronic heating systems.
  • Modine Installation
  • Installation by a professional installer is required by the manufacturer.
California residents see
WARNING: Cancer and Reproductive Harm -
For more information go to:


specs product image PID-48464
Product Category
Unit Heater
General Information
Product Line
Hot Dawg HHD
Product Category
Unit Heater
Medium Learn More
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Heat Exchanger Material
Fuel Type Learn More
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Configuration Learn More
Orientation describes the direction that air will flow through a piece of equipment. (e.g. air will flow horizontally through a "Horizontal" unit heater.) Most equipment will only function properly if installed in the proper orientation.
Heating Capacity
36000 BTU
Maximum Input Capacity Learn More
Maximum Input Capacity
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
45000 BTU
Maximum Air Flow
710 CFM
Minimum Air Flow
425 CFM
Electrical Data
115 Volts
60 Hz
Supply Connection
1/2 Inch
Return Connection
1/2 Inch
Product Height
11 11/24 Inches
Product Width
32 Inches
Product Depth
17 1/2 Inches
Product Weight
73 Pounds
Shipping Weight
83 Pounds
Country of Origin
United States
ETL Listed
Warranty Information
Parts Warranty Learn More
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
2 Years


Modine HHD45S01 Reviews & Ratings
Be the First to Write a Review
Do you own this product?
Please share your insights with fellow shoppers.

Product Q&A

Expert avatar photo
Be the First to Ask A Question Answered by Ken, the eComfort Product Expert

How-To Articles

How to Pick the Perfect Garage Unit Heater
How to Pick the Perfect Garage Unit Heater
Are you ready to transform your cold garage into a dream workshop that you can ...
Replacing HVAC equipment after a flood
Replacing HVAC equipment after a flood
"Water got into my furnace!" It's a complaint I hear all too often when people ...
How to Pick the Perfect Unit Heater
How to Pick the Perfect Unit Heater
If you’re looking to keep your garage or warehouse warm and toasty during...
eComfort How-To Library
eComfort How-To Library
Articles, Tips and Buying Guides from Our Experts


Media Gallery
Modine Hot Dawg HHD - 45,000 BTU - Hot Water Unit Heater - Low Profile - Horizontal - Copper Heat Exchanger
Modine HHD45S01
Customer Review Images