Modine Hot Dawg Garage Heater - 125K BTU/Direct Spark Ignition/LP/Single Stage w/Aluminized Steel Heat Exchanger - HD125AS0121
Features
- Made in the USA
- Low profile, lightweight design easily installs 1” from ceiling with only two angle brackets (sold separately)
- Field fuel conversion kits available
- Finger-proof fan guards on all units
- Reduce the need for maintenance with the permanently lubricated motor
- 100% shut-off with continuous retry to allow for safe ignition in the event the unit doesn’t light on the first try
- Power vented model simplifies side-wall or roof venting with small-diameter vent pipe
- Draws combustion air from inside the workspace
- 4" vent connection
- Liquid Propane
- 125,000 BTU
- Direct spark ignition
- Single stage - on/off operation
- Aluminized steel heat exchanger
Specifications
| Fuel Type |
Propane |
| Control Type |
Electronic / IPI |
| Color / Finish |
Gray |
| Overall Size |
35.5" W × 20.5" H × 31" D |
What our Experts Think
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125,000 BTU Output: Provides powerful heating for larger garages, workshops, and utility spaces.
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Direct Spark Ignition: Reliable and efficient ignition for consistent startup and operation.
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Aluminized Steel Heat Exchanger: Durable construction designed for long-lasting performance.
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Liquid Propane (LP) Fuel: Optimized for propane to deliver efficient heating.
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Single-Stage Operation: Steady, straightforward heat output suitable for everyday use.
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Commercial-Grade Design: Built for rugged use with effective airflow distribution throughout the space.
Q&A
Q: What is the Modine HD125AS0121?
A: A 125,000 BTU liquid propane (LP) garage heater designed for powerful, efficient heating in larger garages and workshops.
Q: What fuel and ignition does it use?
A: Uses LP with direct spark ignition for reliable starts and consistent operation.
Q: What type of heat exchanger does it have?
A: Aluminized steel heat exchanger for durability and long‑lasting performance.
Q: Where is it ideal?
A: Perfect for heating large garages, workshops, service bays, and similar spaces.
Q: Why choose it?
A: Combines high BTU output, dependable propane heating, and rugged construction for effective, everyday warmth.
Maintenance Tips
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Clean the aluminized steel heat exchanger and burner regularly for efficient operation.
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Inspect propane connections and ignition system periodically for leaks or proper function.
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Keep the area around the heater free of dust, debris, and obstructions.
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Test safety controls periodically to ensure reliable and safe performance.
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Schedule annual professional servicing to maintain peak efficiency and longevity.
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Follow manufacturer guidelines for installation, operation, and maintenance.
Damage 
Loss 
Theft 
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