The best type of heater for a garage is a propane or electric unit heater, providing efficient heating and safety for larger spaces and cold conditions.
Shivering in your garage while working on projects? Tired of numb fingers and sluggish tools in winter? A cold garage isn’t just uncomfortable—it can ruin stored items, drain car batteries, and make DIY tasks miserable.
The right garage heater can transform your space into a year-round workshop or cozy retreat. In this guide, we’ll cover the top heating options, safety tips, and expert recommendations—including a comparison of natural gas vs. electric heaters to help you decide.
Key Takeaways
- Infrared heaters heat objects directly, reducing heat loss when doors open.
- Forced-air heaters warm spaces quickly but work best in insulated garages.
- Propane or natural gas models offer high BTU output for large, drafty spaces.
- Always prioritize safety features like tip-over switches and thermostat controls.
Infrared Heaters: Efficient and Targeted Warmth
Infrared heaters emit radiant heat, warming objects and people directly instead of heating the air. This makes them ideal for garages with frequent door openings, as the warmth stays consistent even with drafts. Models like the Heat Storm WiFi Infrared Heater allow zone heating, so you can focus warmth where it’s needed most.
Pros:
- Energy-efficient (no heat lost to air circulation).
- Silent operation—no noisy fans.
- Safe for dust-filled environments (no air movement to stir particles).
Cons:
- Limited range (best for small to medium garages).
- Higher upfront cost than basic forced-air models.
Forced-Air Heaters: Fast and Powerful
Forced-air heaters blow heated air into the space, making them perfect for quickly warming large or poorly insulated garages. The Mr. Heater Portable Propane Forced-Air Heater delivers up to 30,000 BTUs, enough for a 1,000 sq ft area. However, they require proper ventilation to avoid carbon monoxide buildup.
Fuel Options:
| Fuel Type | Best For | BTU Range |
|---|---|---|
| Propane | Large, uninsulated spaces | 10,000–30,000+ |
| Natural Gas | Permanent installations | 15,000–50,000+ |
| Electric | Small, insulated garages | 5,000–10,000 |
Safety Considerations
Garage heaters must have tip-over protection, overheat shutoffs, and proper clearance from flammable materials. Propane models need ventilation, while electric units require dedicated circuits. For more details, see our guide on indoor propane heater safety.
FAQ
What size heater do I need for a 2-car garage?
A 20,000–30,000 BTU heater is ideal for a standard 400–600 sq ft garage. Insulated spaces may require less power.
Can I use a space heater in my garage?
Only if it’s rated for garage use. Standard space heaters lack the power or safety features for workshops.
How much does it cost to run a garage heater?
Electric heaters cost ~$0.15–$0.30 per hour, while propane averages $1.50–$3.00 per hour (varies by local rates).
Final Thoughts
For most garages, infrared heaters offer the best balance of efficiency and comfort, while forced-air models excel in large or drafty spaces. Prioritize safety, proper sizing, and fuel accessibility—like pairing a propane heater with a reliable propane supplier. Ready to install? Check our electric heater installation guide for step-by-step help.
