SKU: 32792462951

Modine Hot Dawg® HD75 Unit Heater

Sale price$636.75 Regular price$707.50
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USA
  • USA
  • CAN

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

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Modine Hot Dawg® HD75 Unit HeaterFreight Savings For large heater orders over $10,000, freight savings are available by contacting our sales team at 1 888 281 9337. With the Modine Hot Dawg Heater, you can easily heat commercial warehouses, DIY hothouses ` Modine HD75 Unit Heater Features: Made in the U. S. Certified for residential, agricultural and industrial use. Quiet operation. An attractive low profile design and neutral paint scheme ensure your Hot Dawg will blend

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

With the Modine Hot Dawg® Heater, you can easily heat commercial warehouses, DIY hothouses `

Modine HD75 Unit Heater Features:

  • Made in the U.S.
  • Certified for residential, agricultural and industrial use.
  • Quiet operation.
  • An attractive low-profile design and neutral paint scheme ensure your Hot Dawg will blend inconspicuously into any garage decor.
  • Durable polyester-powder paint maintains lifelong good looks.
  • A standard power exhaust simplifies side-wall or roof venting with small-diameter vent pipes.
  • Versatile design allows for right or left-hand piping and installation. Gas and flue connections can be changed from one side to the other by simply flipping the Hot Dawg over.
  • The lightweight heater easily installs from the ceiling with only two angle brackets (included).
  • Installs quickly 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 the heat exchanger.
  • The 24,000 through 75,000 (HD25A-HD75A) BTUH heaters will include ceiling mounting brackets. The ceiling mounting brackets for the 100,000 and 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: 32792462951

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patricia normand
Port Orchard, US
★★★★★ 5
untuck it shirt!
Color: Beige, Size: X-Large
lovely shirt! fits well
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Reviewed in the United States on May 31, 2026
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Jeff Tyler
Draper, US
★★★★★ 5
LOVE these shirts, came back and bought more!
These shirts look SO good. I am a senior manager in a large corporation so have to dress nice every day. I loved the first one of these shirts so much I came back and have now bought 15 of them in different colors. Basically, these are now all I wear. Buy yourself 15 bamboo undershirts with the V neck (you don't want the layered look with dress shirts, you want the V neck so you can't see the undershirt), half in white and half in black to wear under these and you are set. GUYS.....WHEN YOU FIRST BUY THESE YOU MUST IRON THEM. I see the pics of people wearing them here, and you can still see the fold lines from being packaged and that looks terrible. Washing alone won't get rid of the fold lines. Get your iron and set it for POLYESTER which is a lower heat setting. If you set it hot, it will melt the shirt. But set it for polyester and the lines iron out VERY easily and fast. You only have to do this when you first buy them. I've never had to iron any of them again after the first time. They are very wrinkle resistant! I HATE my cotton dress shirts now. These Coofandy shirts STRETCH like crazy! You can bend and reach for things no problem. I'm able to wear all of these with Chinos, dress slacks AND jeans so they are incredibly versitile! My wife and my girlfriend both (joking!) love how soft the shirt feels on me. I have to wear these shirts every day and own enough so I can do laundry once every other week and so far all the shirts have been very durable with no tears, rips, any problems at all. They all still look new.
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Reviewed in the United States on March 27, 2026
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Leslie A. Rowe
Cuba, US
★★★★★ 4
Must iron first before wearing. Then wrinkle free.
The fit is perfect. The material is quite nice. The only problem would be they are hard to de-wrinkle from original packaging. I’ve washed my shirt several times and it’s still showing the creases. The only way to get rid of them is to launder them or iron them. I think once this occurs, they remain wrinkle free for a while. This is the third of the exact same shirt I got in different colors.
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Reviewed in the United States on January 2, 2026
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Sanjulee
Waukegan, US
★★★★★ 5
Nice quality shirt
Color: Purple, Size: XX-Large
Nice material and fit is accurate. However shirts are rolled up in a tube, so if you need to wear the shirt the day you receive it be prepared to iron it!
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Reviewed in the United States on May 7, 2026
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Ronaldo Lopez
Lowell, US
★★★★★ 3
Calidad de las camisas
Color: A White, Size: Medium
I had already bought one shirt, so this time I bought two more. The light blue one is the same quality as the one I bought the first time. But the white one wasn't the same quality. It was also a different shade of white. They should try to maintain consistent quality across the board.
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Reviewed in the United States on March 25, 2026

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