SKU: 35242440915

Modine Hot Dawg® HD45 Unit Heater

Sale price$540.00 Regular price$600.00
Save 10%

Pay in installments of $150.00 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Modine Hot Dawg® HD45 Unit HeaterFreight Savings For large heater orders over $10,000, freight savings are available by contacting our sales team at 1 888 281 9337. Model HD Hot Dawg Unit Heaters: For applications requiring a low profile unit. The Hot Dawg may be installed in residential, greenhouse or commercial applications just one inch below the ceiling. Don't be fooled by cheap Chinese manufactured heaters currently flooding the market. Since 1916, Modine has provided quality

Freight Savings
For large heater orders over $10,000, freight savings are available by contacting our sales team at 1-888-281-9337.

Model HD Hot Dawg® Unit Heaters: For applications requiring a low profile unit. The Hot Dawg may be installed in residential, greenhouse or commercial applications just one inch below the ceiling. Don't be fooled by cheap Chinese manufactured heaters currently flooding the market. Since 1916, Modine has provided quality heating solutions that are made in America to the highest possible standards. The superior quality matched with the following features makes the Hot Dawg unit heater an easy choice for a variety of applications.

Standard Features

  • Made in the USA
  • Certified for residential, agricultural and industrial use.
  • Quiet operation.
  • Attractive low-profile design and neutral paint scheme assure that Hot Dawg will blend inconspicuously into any garage decor.
  • Durable polyester-powder paint maintains life-long good looks.
  • Standard power exhaust simplifies side-wall or roof venting with small-diameter vent pipe.
  • Versatile design allows for right or left-hand piping and installation. Gas, electrical and flue connections can be changed from one side to the other by simply flipping the Hot Dawg over.
  • Lightweight, easily installs from ceiling with only 2 angle brackets (included).
  • Installs quickly and easily with field wiring connections and knockouts for quick access to gas and electricity.
  • Designed for natural or propane gas.
  • Sealed, permanently-lubricated motor for trouble-free dependability.
  • Full 10-year warranty on heat exchanger.
  • 24,000 thru 75,0000 (HD25A - HD75A) BTUH Heaters will include ceiling mounting brackets. Ceiling mounting brackets for the 100,000 & 125,000 (HD100A, HD125A) BTUH Heaters must be purchased separately.

Dimensions and Diagrams

Dimensions, Diagrams and Specifications (PDF)

Modine Greenhouse Heating Solutions (PDF)

Wiring Diagrams (PDF)


Performance Specifications

Model Application Input BTUH Output BTUH Vent Size Weight (lbs)
HD30 1 to 1-1/2 Car Garage
or up to 250 SF Greenhouse.
30,000 24,600 Requires 3" Vent Pipe 55
HD45 2 to 2-1/2 Car Garage
or up to 350 SF Greenhouse.
45,000 36,900 Requires 3" Vent Pipe 60
HD60 3 to 3-1/2 Car Garage
or up to 550 SF Greenhouse.
60,000 49,200 Requires 3" Vent Pipe 80
HD75 Large Garage
or up to 650 SF Greenhouse.
75,000 61,500 Requires 3" Vent Pipe 85
HD100 Up to 1000 SF. 100,000 82,000 Requires 4" Vent Pipe 125
HD125 Up to 1200 SF. 125,000 102,500 Requires 4" Vent Pipe 125

Installation

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


Troubleshooting

Based on our experience in selling Modine Hot Dawg Heaters, we have written up a troubleshooting guide that deals with the issues we most commonly hear from customers. - Troubleshoot a Modine Hot Dawg

If you still need help, check out Modine's own troubleshooting guide.


Comparison Chart

Modine HD-Series vs. Sterling RF-Series

Specification Modine HD-Series Sterling RF-Series Comments
BTU Range 30 - 125 MBH 30 - 90 MBH Modine covers more applications
Minimum Efficiency 80% 80% Same non-condensing high efficiency
Blower Fan Units
(HDB model only)
60 - 125 MBH Not Available Modine covers more applications
Casing Paint Polyester Powder Wet Enamel Modine units will look better longer
Quiet Swept Wing Fans 100 and 125 MBH Not Available Larger Modine units are quieter
Heat Exchanger Gauge 18 Gauge 20 Gauge Modine heat exchangers are heavier gauge
Optional Stainless Steel Yes Not Available Modine covers more applications for corrosive environments
T.E. Fan Motor Standard Yes No Modine motors are protected for longer life
Power Vented X-Changer Warranty
(HDS and HDC models only)
10 Years 10 Years Same 10 year heat exchanger warranty
Sep. Comb. X Changer Warranty
(HDS & HDC models only
10 Years 5 Years Modine separated combustion units warrantied longer
Component Warranty 2 Years 1 Year Modine parts warrantied longer

Additional Information

Manual

Residential Owners Manual (PDF)

Warranty

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)


Product Video


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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 35242440915

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 21 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
Jeff
Houston, US
★★★★★ 5
this 27mm oil filter socket – it’s incredible. It’s the best.
Size: 27mm, Color: Red, Size: 27mm, Color: Red
Let me tell you something, folks – nobody changes oil like I change oil. Nobody. I’ve been around the best cars, the best mechanics, and let me just say, this 27mm oil filter socket – it’s incredible. It’s the best. I don’t know who made it, but I have to say, it’s tremendous. You know, people always ask me, "how do you do it? How do you change oil so perfectly?” And I tell them – it’s the tools. This socket is the reason why I can change oil faster and better than anyone. It fits perfectly on the filter, like it was made just for me, like everything else in my life. You slide it on, you give it a twist, and boom, you're done. It’s like magic – but not really, because magic is for others. This is skill. This is expertise. This is the power of the greatest tool ever made. You won’t find a better oil filter socket wrench. This tool makes you a winner. It’s precision-engineered, like the T-ump Tower of oil filter wrenches – big, strong, and reliable. And the best part? It’ll last forever. I’ve used it on many cars, and every time, it gets the job done with style. People will look at your work and say, “Who changed that oil? That’s perfect.” And you’ll know – it’s all because of the best socket out there. So, if you want to change oil like the greatest – you need this socket. It’s unbeatable. Believe me. You'll never go back to anything else
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 24, 2025
J
Verified Purchase
Jason
Houston, US
★★★★★ 5
Fits perfectly
Size: 32mm, Color: Green
Works exactly as expected. Fits the 32mm oil filter housing perfectly and makes removal quick without slipping or rounding. Feels solid and well-made for the price. Used it for an oil change and it saved a lot of time compared to a strap wrench. Simple, effective tool—glad I bought it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
M
Verified Purchase
Mayelin Naranjo terga
Whiting, US
★★★★★ 5
worked for my dodge.
Size: 28mm, Color: Red
worked for my dodge. light but needs to not be so strong as to brake the plastic. seems like it will keep the plastic in tact and not kill it. nice and bright green i can find it easy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
R
Verified Purchase
Riley Smith
Belleville, US
★★★★★ 5
Perfect Fit 28mm Fuel Filter Socket
Size: 28mm, Color: Red
I bought the Felisbieti 28mm fuel filter socket for a vehicle maintenance project, and it worked perfectly. The fit is precise, gripping the fuel filter securely without slipping or rounding edges. The build feels sturdy and durable, with a solid metal finish that stands up to repeated use. It fits snugly on my ratchet and made removing and installing the filter much easier and faster than using adjustable tools. The only minor thing to note is that it’s specific to 28mm filters, so make sure it matches your vehicle. Overall, this socket is well-made, reliable, and a must-have for anyone doing DIY fuel filter work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
R
Verified Purchase
Rowdy Yates
Alexandria, US
★★★★★ 5
Perfect socket for the job
Size: 24mm, Color: Green, Size: 24mm, Color: Green
I purchased this 24mm socket specificaly to remove the oil filter housing on my Ram Promaster 2500 truck. Since there is limited space to get a standard socket in this area, this low profile socket was able to do the job without requiring me to loosen and push aside other components. I like that this socket is light weight, made of aluminum with large easy to read size eched into the body. the oil filter housing is made of plastic and does not require a beefy heavy steel socket. The walls on this socket are plenty thick as to cause me no concern about durability. To me, the green color is a nice touch as will be easy to spot in my socket set for the oil changes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026

recommand products