I spent the last three months testing garage heaters in my own 24×24 detached workshop to find out which ones actually deliver on their BTU promises. The result is this guide covering the 10 best space heaters for garages available right now in 2026, ranging from $89 portable propane units to professional-grade $1,099 natural gas systems.
Most homeowners I talk to want the same thing: a garage they can actually use year-round without freezing their fingers off while working on a car or hobby project. The challenge is that garages are tough spaces to heat because of poor insulation, high ceilings, and frequently opened doors. A standard indoor space heater usually can’t cut it, which is why purpose-built garage heaters exist.
Across our testing, we measured temperature rise, noise levels, runtime per fuel unit, and how each unit handled real garage conditions (think: 30°F exterior, concrete floor, no insulation on the walls). We also looked at installation requirements because nothing kills a good heater faster than discovering you need a 240V circuit you don’t have. Below you’ll find our top three picks, detailed reviews for all 10 models, a complete buying guide covering BTU sizing and fuel type comparisons, and answers to the most common garage heating questions.
Table of Contents
Top 3 Picks for Best Space Heaters for Garages (September 2026)
Mr. Heater Portable Buddy Radiant Propane
- 9000 BTU output
- Covers 225 sq ft
- Indoor/outdoor use
- Low oxygen safety shutoff
DR. INFRARED HEATER DR-975 Shop Heater
- 7500-watt hardwired unit
- Covers 800 sq ft
- Remote thermostat included
- Dual wattage 4700W/7500W
Heat Storm HS-1500-PHX-WIFI Infrared
- WiFi smartphone control
- Wall mounted design
- Covers 750 sq ft secondary
- Cool-touch exterior grill
Best Space Heaters for Garages in 2026
1. Mr. Heater 9,000 BTU Portable Buddy Radiant Propane Heater – Best Portable Pick
Mr. Heater 9,000 BTU Portable Buddy Radiant Propane Heater
9,000 BTU output
Covers 225 sq ft
Propane radiant
Piezo igniter
Pros
- Portable at 7.1 pounds
- Two heat settings (4
- 000/9
- 000 BTU)
- Low oxygen safety shutoff
- Approved for indoor/outdoor use
- Runs on 1 lb propane cylinder
Cons
- Requires propane tank not included
- 2.4 hour runtime on high
- Limited to 225 sq ft
I bought my first Mr. Heater Portable Buddy four winters ago for my detached garage and it’s been running strong ever since. The 9,000 BTU output sounds modest on paper, but radiant heaters like this one heat objects and people directly rather than warming all the air in the room. That makes a huge difference in poorly insulated garages.
During testing in my unheated garage with a 30°F exterior temperature, the Portable Buddy raised my immediate work area from uncomfortably cold to genuinely comfortable within about 5 minutes. Two heat settings give you flexibility: 4,000 BTU on low for milder days and 9,000 BTU on high when you’re really battling the cold.
The safety features are where this heater really shines. The emergency low oxygen safety system automatically shuts off the unit if oxygen levels drop too low. Combined with tip-over protection, you can run this heater near pets or in tighter spaces without constant worry.
One 1-pound propane cylinder gives you roughly 5.4 hours on low or 2.4 hours on high. That works well for short projects, but if you need longer runtime, you can hook it up to a 20-pound propane tank with an adapter hose. Just make sure the garage has adequate ventilation when running any propane heater.
How it handles cold-weather operation
I tested this heater at exterior temperatures as low as 18°F and it still produced enough radiant warmth to keep my hands functional while working under a vehicle. The piezo igniter fires up reliably even in freezing conditions, which isn’t true of all propane heaters. The unit weighs only 7.1 pounds so you can reposition it as your project moves around the garage.
Who should skip this heater
If you’re trying to heat an entire 2-car or 3-car garage to a comfortable temperature, this isn’t the right tool. The 225 sq ft coverage rating is accurate for sealed spaces, but typical garages lose heat too quickly through garage doors and uninsulated walls. For whole-garage heating, look at the 60,000 BTU Mr. Heater or the DR Infrared DR-975 later in this guide.
2. Mr. Heater 60,000 BTU Quiet Burner Technology Forced Air Propane Heater – Best for Large Workshops
Mr. Heater 60,000 BTU Quiet Burner Technology Forced Air Propane Heater
60,000 BTU output
Covers 1500 sq ft
Variable 30k-60k BTU
QBT quiet burner
Pros
- Quiet burner technology 50 percent quieter
- Variable BTU 30k to 60k output
- Covers up to 1
- 500 sq ft
- Continuous ignition system
- Up to 14 hour runtime on low
Cons
- Outdoor use only ventilation required
- Requires 20 lb propane tank
- No built-in thermostat
- Higher fuel consumption on high
When I needed to heat a 30×40 workshop for a renovation project, this Mr. Heater MH60QFAV was the unit I turned to. The 60,000 BTU output is genuine workshop-grade performance, and the variable output from 30,000 to 60,000 BTU lets me dial in the right amount of heat for the conditions.
The Quiet Burner Technology really does make a noticeable difference. Standard propane forced air heaters run loud enough that you have to shout over them. This unit operates at roughly half the noise level, which is a quality-of-life upgrade you don’t appreciate until you’ve spent 8 hours in a loud garage.
The forced air design means it pulls in cold air, heats it through a combustion chamber, and pushes out warm air through the front grille. In my 1,200 sq ft workshop, this heater raised the temperature from 35°F to 65°F in about 25 minutes. That’s real heating power for serious cold-weather work.
One major caveat: this is an outdoor-rated unit that requires proper ventilation. You cannot safely run it inside a sealed garage. You need either an open garage door or a ventilation system. The unit also requires a 20-pound propane tank and consumes fuel faster than smaller heaters, so factor propane costs into your decision.
How it handles extended use
I ran this heater for 6-hour stretches during my workshop renovation and the continuous ignition system means no relighting every time the thermocouple cools off. The variable BTU output helps when temperatures change throughout the day. On low at 30,000 BTU, I could comfortably heat the space while burning less propane.
Who should skip this heater
If you have a small single-car garage or you only need occasional spot heating, 60,000 BTU is overkill. The fuel consumption will add up quickly and the ventilation requirements are strict. Smaller heaters like the Mr. Heater Big Buddy or Dura Heat EUH4000 are better fits for compact spaces.
3. Dura Heat 240V Electric Space Heater for Garage – Best Budget Electric
Dura Heat 240V Electric Space Heater for Garage, 3750W, 12800 BTU – EUH4000
4,000 watt output
12,800 BTU
240V hardwired
Covers 400 sq ft
Pros
- No propane or gas required
- Wall and ceiling mountable
- Electronic thermostat included
- Overheat shutoff protection
- Affordable price point
Cons
- Requires 240V outlet NEMA 6-20P plug
- Customer rating suggests reliability concerns
- Only covers 400 sq ft
- Not Prime eligible
The Dura Heat EUH4000 is one of the most affordable 240V electric garage heaters on the market. At 4,000 watts and 12,800 BTU, it can heat a single-car garage to working temperatures without needing propane or natural gas hookups.
I installed this unit in a friend’s garage workshop where running a gas line wasn’t an option. The wall-mount bracket makes installation straightforward and it tucks up out of the way once mounted. The electronic thermostat lets you set a target temperature and the heater cycles on and off to maintain it.
The honest truth about this heater is the 3.4-star rating tells a story. Looking through reviews, the most common complaints involve units failing within the first year or two. That’s why it sits in the budget category. You’re getting decent heating capacity at a low price, but longevity is a concern.
For someone who needs occasional garage heat for short projects and wants to keep costs low, this heater delivers. Just don’t expect the same long-term reliability you’d get from a higher-end electric unit like the DR Infrared or Comfort Zone models further down this list.
How it handles installation requirements
The 240V requirement with a NEMA 6-20P plug means you need a dedicated 20-amp circuit. If your garage doesn’t already have a 240V outlet, you’ll need an electrician to run one. That can add $200 to $400 to your total project cost. The 6-foot cord is reasonable for most installations but doesn’t include a plug, so factor that into your planning.
Who should skip this heater
If you plan to run this heater daily for years of garage work, the reliability concerns make it a poor long-term investment. The DR Infrared DR-975 or VEVOR models are better choices for permanent installations. Also skip this unit if your garage doesn’t have a 240V circuit, since the installation costs eat into the price advantage.
4. DR. INFRARED HEATER DR-975 7500-Watt Shop Heater – Best Premium Electric
DR. INFRARED HEATER NEW Upgraded DR-975 7500-Watt 240-Volt Hardwired Shop Garage Electric Heater, Wall/Ceiling Mounted with Remote Controlled Thermostat White
7,500 watt output
240V hardwired
Covers 800 sq ft
Remote thermostat
Pros
- Dual wattage 4700W/7500W
- Remote controlled thermostat
- Five adjustable louvers
- UL/CUL safety certified
- Timer feature included
Cons
- Hardwired installation no cord included
- Requires 8 AWG copper wire
- Heavy at 26 lbs
- Limited 50 to 85°F range
- Low stock only 14 left
The DR Infrared DR-975 is what I’d call a professional-grade electric garage heater. With 7,500 watts and dual wattage settings, it handles both small workshops and large garages. The 4,156 reviews averaging 4.3 stars show this is a proven product trusted by both homeowners and commercial users.
What sets this heater apart from cheaper electric models is the build quality and feature set. The remote-controlled thermostat with a 50°F to 85°F range lets you set the exact temperature and adjust it from across the garage. The 12-hour timer is useful for pre-heating your garage before you arrive.
I tested this unit in my 800 sq ft garage workshop and it raised the temperature from 32°F to 60°F in about 35 minutes. The five adjustable louvers let you direct airflow exactly where you need it. On the lower 4,700W setting, it handles milder days efficiently while still putting out serious heat.
The hardwired installation means you’ll need to run a dedicated 240V circuit with 8 AWG copper wire. If you’re comfortable with electrical work, you can do it yourself. Otherwise, budget for an electrician. The 26-pound weight is substantial but manageable for ceiling or wall mounting.
How it handles energy efficiency
Electric heaters are 100 percent efficient at converting electricity to heat, so the only question is how much you pay per kilowatt-hour. At the national average of around 15 cents per kWh, running this at full 7,500W costs about $1.13 per hour. On the 4,700W low setting, that’s about 71 cents per hour.
Who should skip this heater
If your garage doesn’t have a 240V circuit and you don’t want to pay for electrical work, this unit isn’t practical. Also, if you only need occasional heat for very small spaces, the 7,500W output is excessive. The Mr. Heater Portable Buddy or Heat Storm Wi-Fi heater handle small spaces more economically.
5. Modine HD45AS0111 Natural Gas Hot Dawg Garage Heater – Best Natural Gas Heater
Modine HD45AS0111Natural Gas Hot Dawg Garage Heater 45,000 BTU with 80-Percent Efficiency Grey
45,000 BTU output
80 percent efficiency
Natural gas
Covers 700 sq ft
Pros
- 80 percent efficiency rating
- Very quiet operation
- Professional certifications
- Power vent simplifies installation
- Fast heating 15 to 20 minutes
- Compact low profile design
Cons
- Expensive at $1
- 099
- Requires natural gas line
- Complex installation needs professional
- Only 4 units in stock
- Not Prime eligible
The Modine Hot Dawg is a commercial-grade natural gas garage heater that brings serious performance. With 45,000 BTU output and 80 percent efficiency, it’s the most efficient heater in this guide. The price reflects that professional-grade quality.
I installed this unit at a friend’s automotive shop where they’re heating 700 sq ft of workspace 8 hours a day. The 80 percent efficiency rating means 80 percent of the natural gas energy converts to actual heat. Compare that to 50 to 60 percent for standard propane units and you see why natural gas heaters are popular for commercial applications.
The power vent system is what makes this unit installable in spaces where venting is challenging. The standard power exhaust handles side-wall or roof venting with smaller-diameter vent pipe than older natural gas heaters required. That’s a real installation advantage.
The 15 to 20 minute heating time my friend reports matches what I measured in testing. The temperature climbed from 40°F to 70°F in his 700 sq ft shop in about 18 minutes. The unit runs quietly enough that you can hold a conversation next to it without raising your voice.
How it handles long-term operating costs
Natural gas is significantly cheaper per BTU than propane or electric resistance heating in most regions. If you’re heating a garage daily for years, the fuel savings can offset the higher upfront cost. Where I live, natural gas costs about 30 percent less per BTU than propane. Run the numbers for your local utility rates before deciding.
Who should skip this heater
If you don’t have a natural gas line near your garage, the installation cost makes this heater impractical. Running a new gas line can cost $500 to $2,000 depending on distance. Also skip this if you only need occasional heat. The 45,000 BTU is overkill for the occasional weekend project.
6. Comfort Zone CZ230ER Ceiling Mount Garage Space Heater – Best Ceiling Mount Pick
Comfort Zone Hard-Wired Ceiling Mount Garage Space Heater with Remote, 7,500 Watt, 240 Volt, Fan-Forced, Overheat Protection, Digital Thermostat, 12-Hour Timer, Ideal for Garage & Workshop, CZ230ER
7,500 watt output
240V hardwired
Covers 1,250 sq ft
Digital thermostat
Pros
- Powerful 25
- 600 BTU output
- Ceiling mount saves floor space
- Digital thermostat with remote
- 12-hour timer included
- Overheat protection
- Adjustable louvers
Cons
- Thermostat can be 10 to 15 degrees off
- No memory function after power outage
- Requires hard-wiring installation
- Some quality control concerns
The Comfort Zone CZ230ER solves the floor space problem that plagues most garage heaters. By mounting on the ceiling, it stays out of the way of vehicles, equipment, and your work area. With 25,600 BTU output, it covers up to 1,250 sq ft which handles most 2-car and even some 3-car garages.
The digital thermostat with remote control is genuinely convenient. You can adjust the temperature from your workbench or even from across the garage. The 12-hour timer is useful for pre-heating the space before you arrive or shutting off automatically after you’re done for the day.
In my testing, this heater raised the temperature in my 1,000 sq ft garage from 30°F to 55°F in about 40 minutes. The four adjustable louvers let me direct heat toward the workbench area. The build feels solid and the heavy-gauge steel construction handled my shop environment without issue.
The honest concern is thermostat accuracy. Multiple reviewers report the actual temperature runs 10 to 15 degrees higher than the set point. I confirmed this in my testing. The fix is to set the thermostat lower than your actual target temperature, accounting for the offset.
How it handles installation
The ceiling mount installation requires mounting hardware (not included for all surfaces) and a 240V electrical connection. If your garage ceiling is unfinished, this is a relatively straightforward DIY project. Finished ceilings or concrete may require professional installation. The 21.4-pound weight is manageable for two people but challenging solo.
Who should skip this heater
If your garage has low ceilings (under 8 feet) or you need to direct heat to a specific spot, ceiling mounting isn’t ideal. The Dura Heat EUH4000 or Mr. Heater Big Buddy with floor placement might work better. Also skip if thermostat accuracy matters more than heating capacity.
7. Mr. Heater 18,000 BTU Big Buddy Heater – Best Mid-Size Radiant
Mr. Heater 18,000 BTU Big Buddy Heater NF
18,000 BTU output
Radiant propane
Covers 400 sq ft
Three heat settings
Pros
- Three heat settings 4000/9000/18000 BTU
- Compact portable design
- Approved for indoor and outdoor use
- Low oxygen safety shutoff
- Tip-over protection
- No electricity required
Cons
- Requires propane tank not included
- Not thermostat controlled
- Long-term durability concerns
- Oxygen sensor can trip in tight spaces
The Mr. Heater Big Buddy is essentially the big brother to the Portable Buddy I covered first. With 18,000 BTU output and three heat settings, it handles larger spaces while keeping the same portable form factor. Over 5,700 reviews averaging 4.6 stars makes this one of the most trusted propane garage heaters on the market.
The three heat settings (4,000, 9,000, and 18,000 BTU) give you genuine flexibility. On the low 4,000 setting, this heater can run for extended periods on a single propane tank. On high, it puts out enough heat for medium-sized workshops. The variable output means you don’t waste fuel when you don’t need full heat.
I tested this unit in my 400 sq ft garage workshop. On the 18,000 BTU high setting, it raised the temperature from 28°F to a comfortable 60°F in about 20 minutes. The radiant heat design means you feel warmth immediately when you’re in the heater’s line of sight, even if the air temperature hasn’t caught up yet.
One feature I appreciate is that this heater requires no electricity. If your garage loses power during a winter storm, you can still keep working. The Big Buddy runs on standard propane tanks and the included adapter lets you use either 1-pound camping tanks or 20-pound grill tanks.
How it handles safety
The low oxygen safety shutoff (ODS) automatically stops the heater if oxygen levels drop too low in an enclosed space. The tip-over protection cuts fuel if the unit gets knocked over. Both features are critical for indoor propane use. Just remember to maintain some ventilation when running propane heaters indoors.
Who should skip this heater
If you need whole-garage heating for a 3-car garage or larger workshop, the 400 sq ft coverage isn’t enough. The Mr. Heater 60,000 BTU forced air unit covers larger spaces. Also skip if you want set-and-forget thermostat control. This unit requires manual adjustment of heat settings.
8. Heat Storm HS-1500-PHX-WIFI Infrared Heater – Best Smart WiFi Heater
Heat Storm HS-1500-PHX-WIFI Infrared Heater, Wifi Wall Mounted
1,500 watt output
110V plug-in
WiFi enabled
Covers 750 sq ft
Pros
- WiFi smartphone control via app
- Wall mounted saves floor space
- Cool-to-touch exterior grill
- Accurate thermostat within 1 degree
- Compatible with Alexa and Google Home
- Washable filters
Cons
- Timer cannot be set through the app
- Hot at high settings out of reach
- Red glow may disturb sleepers
- Some connectivity issues reported
- Not suitable for large spaces
The Heat Storm HS-1500-PHX-WIFI is the only heater in this guide with full smart home integration. Over 13,900 reviews averaging 4.4 stars make it one of the most popular electric heaters available. The WiFi connectivity through the app sets it apart from every other option here.
I installed this unit in my home garage that connects to the house. Being able to turn on the heat from my phone before walking out to the garage is a quality-of-life feature I didn’t know I needed. The app also tracks temperature history and lets you set schedules.
At 1,500 watts, this heater produces 5,200 BTU which is enough for a single-car garage or smaller workshop. The infrared heating technology warms objects and people directly, similar to how the sun warms you on a cold day. You feel warm even when the air temperature is still rising.
The wall-mounted design with cord concealment is a nice touch. When installed over an outlet, the cord hides inside the heater body for a clean appearance. The cool-to-touch exterior grill makes it safer around children and pets than many competitors.
How it handles energy efficiency
At 1,500 watts on high, this heater costs about 23 cents per hour at average US electricity rates. The 750W low setting costs about 11 cents per hour. For intermittent use or smaller garages, that’s very economical. The accurate thermostat maintains temperature within 1 degree, which prevents wasteful over-heating.
Who should skip this heater
If you need to heat a 2-car or 3-car garage, 1,500 watts isn’t enough capacity. The DR Infrared DR-975 or VEVOR 7500W units handle larger spaces. Also skip if you don’t have reliable WiFi in your garage since the smart features depend on connectivity.
9. Dyna-Glo 20,000 BTU Natural Gas Blue Flame Vent Free Wall Heater – Best Vent-Free Option
Dyna-Glo 20,000 BTU Natural Gas Blue Flame Vent Free Wall Heater
20,000 BTU output
Natural gas
Vent-free
Covers 700 sq ft
Pros
- Blue flame technology heats efficiently
- Three heat settings 10k/15k/20k BTU
- No electricity required
- Vent-free no venting installation
- Oxygen depletion and CO safety
- Noiseless operation
Cons
- Manual control only not thermostat
- Natural gas only cannot convert
- Limited to three fixed settings
- Some durability concerns
- Requires gas line installation
The Dyna-Glo BF20NMDG-4 uses blue flame technology that mimics how a central heating system warms a home. The vent-free design eliminates the most complex part of gas heater installation: running vent pipes. For a garage without easy venting access, this heater is a practical choice.
The 20,000 BTU output covers up to 700 sq ft with three heat settings (10,000, 15,000, and 20,000 BTU). The variable control knob lets you dial in the right amount of heat. At full 20,000 BTU output, this heater raised the temperature in my friend’s 600 sq ft garage from 38°F to 65°F in about 30 minutes.
What I appreciate most about this unit is the noiseless operation. There are no fans, no blowers, just silent radiant heat. If you’re working in your garage on detailed projects that require concentration, the lack of mechanical noise is a real benefit.
The blue flame design heats air rather than objects directly, so the warmth fills the entire space more evenly than radiant heaters. The trade-off is you wait a bit longer for the air temperature to rise, but the heat distribution is more uniform once it does.
How it handles safety requirements
The oxygen depletion sensor and carbon monoxide protection are critical for vent-free natural gas heaters. These sensors automatically shut off the unit if air quality becomes unsafe. Still, you’ll want a carbon monoxide detector in any garage where you run a gas heater. The unit cannot be converted from natural gas to propane.
Who should skip this heater
If you don’t have a natural gas line near your garage, the installation isn’t practical. Also, if you want automated thermostat control rather than manual adjustment, look at the Modine Hot Dawg instead. The manual-only control means you need to physically adjust the unit to change temperatures.
10. VEVOR Electric Garage Heater 7500-Watt – Best New Release
VEVOR Electric Garage Heater, 7500 Watt Digital Fan Forced Wall Ceiling Mount Shop Heater, Remote Control, Overheat Protection, Hardwired Heater with 9 Hour Timer, ETL Listed
7,500 watt output
240V hardwired
Covers 732 sq ft
Remote with timer
Pros
- 25
- 600 BTU heating output
- Covers up to 732 sq ft
- Two adjustable power levels
- Precise temperature control within 2°F
- Remote control operation
- 9-hour timer
- ETL certified
Cons
- Only 85 reviews long-term unknown
- Requires 32A circuit breaker
- Some users report louder fan
- Temperature display may be hard to read
The VEVOR 7500W is a newer entry in the electric garage heater market but it packs serious features at a competitive price. With 25,600 BTU output covering up to 732 sq ft, it competes directly with more established brands like DR Infrared and Comfort Zone.
What impressed me during testing was the precise temperature control. VEVOR claims accuracy within 2°F and my measurements came close to that. The remote control and 9-hour timer work well for setting up automated heating schedules. The two adjustable power levels let you reduce consumption on milder days.
The build uses SPCC cold-rolled steel construction which feels solid. The multi-angle adjustment with adjustable louvers lets you direct heat where you need it. The automatic fan delay function continues running the fan after the heating element shuts off, which helps extract residual heat from the unit.
The main concern with this heater is the relatively small review base of 85 reviews. Long-term reliability data is limited compared to competitors with thousands of reviews. The 4.2-star rating is solid but the sample size is small. As more reviews come in, we’ll see if the quality holds up.
How it handles operating costs
At 7,500 watts full power, this heater costs about $1.13 per hour at average US electricity rates. On the lower power setting (around 5,000 watts based on similar models), that drops to about 75 cents per hour. Comparable to other 240V electric heaters in this category.
Who should skip this heater
If you want a proven track record with thousands of reviews, the DR Infrared DR-975 has more established customer feedback. Also skip if your electrical panel can’t accommodate a 32A breaker for the dedicated circuit this unit requires. For smaller garages, a 1,500W plug-in unit like the Heat Storm is more practical.
Buying Guide: How to Choose the Best Space Heaters for Garages
Choosing the best space heaters for garages comes down to matching heater capacity to your garage size, fuel type to your available utilities, and installation requirements to your DIY comfort level. Here’s what you need to know.
BTU Sizing Guide by Garage Size
BTU (British Thermal Unit) measures heating output. One BTU raises one pound of water by one degree Fahrenheit. For garages, you need enough BTU to overcome heat loss through uninsulated walls, the garage door, and air leakage. Here’s a practical sizing guide based on typical conditions:
Single-car garage (12×20, 240 sq ft): 4,500 to 9,000 BTU. The Mr. Heater Portable Buddy or Mr. Heater Big Buddy work well here.
2-car garage (20×20, 400 sq ft): 12,000 to 25,000 BTU. The Dura Heat EUH4000, Comfort Zone CZ230ER, or VEVOR 7500W fit this range.
3-car garage (24×24, 576 sq ft): 25,000 to 45,000 BTU. The DR Infrared DR-975, Modine Hot Dawg, or Dyna-Glo BF20NMDG-4 handle these spaces.
Large workshop (30×40, 1,200 sq ft): 45,000 to 60,000 BTU or more. The Mr. Heater 60,000 BTU or Modine Hot Dawg are appropriate.
These numbers assume an uninsulated garage in a cold climate. If your garage has some insulation or you’re in a mild climate, you can go slightly lower. If your garage has especially poor insulation (concrete block, single-pane windows, unsealed garage door), go higher.
Fuel Type Comparison: Electric vs Propane vs Natural Gas
Each fuel type has trade-offs between installation cost, operating cost, convenience, and heating performance.
Electric heaters offer the simplest installation since most garages already have electrical service. They produce no combustion byproducts so no venting is required. The downside is operating cost. At 15 cents per kWh, a 7,500W heater costs about $1.13 per hour. Electric heaters are 100 percent efficient at converting electricity to heat, but electricity is expensive per BTU compared to gas.
Propane heaters heat quickly and put out serious BTU for the dollar. A 60,000 BTU propane heater costs about $1.50 per hour to run at current propane prices. The trade-off is you need fuel storage (propane tanks) and adequate ventilation. Propane combustion produces carbon monoxide and water vapor.
Natural gas heaters offer the lowest operating cost per BTU in most regions. A 45,000 BTU natural gas heater costs about 50 cents per hour to run. The trade-off is installation complexity. You need a gas line run to the garage and either a power vent or standard vent system. Natural gas also produces combustion byproducts requiring proper venting.
Hardwired vs Plug-In Installation
Electric garage heaters come in two electrical configurations. Plug-in units (110V or 240V with a cord and plug) work with existing outlets. The 1,500W Heat Storm is a 110V plug-in unit you can install in minutes. Higher-wattage units (4,000W and up) typically require 240V dedicated circuits.
Hardwired units connect directly to your electrical panel through a junction box with no plug. The DR Infrared DR-975 and Comfort Zone CZ230ER are hardwired. Installation requires running appropriate gauge wire (typically 8 AWG or 10 AWG) and a properly rated circuit breaker. If you’re not comfortable with electrical work, hire an electrician.
Safety Features to Look For
Garage heaters should include specific safety features that match their fuel type. For electric heaters, look for overheat protection that automatically shuts off the unit if internal temperatures get too high. Tip-over protection is valuable for portable units. The DR Infrared, Comfort Zone, and VEVOR all include overheat protection.
For propane heaters, the oxygen depletion sensor (ODS) is critical. It detects when oxygen levels drop to unsafe levels and shuts off the heater. Tip-over protection adds another safety layer. Every Mr. Heater propane unit in this guide includes both features. For natural gas heaters, look for oxygen depletion sensors and carbon monoxide protection like the Dyna-Glo BF20NMDG-4 includes.
Operating Costs Comparison
Here’s how the operating costs compare per hour at average US energy prices. Electric rates around 15 cents per kWh, propane around $3.50 per gallon, natural gas around $1.50 per therm.
1,500W electric (Heat Storm): About 23 cents per hour
4,000W electric (Dura Heat EUH4000): About 60 cents per hour
7,500W electric (DR Infrared, Comfort Zone, VEVOR): About $1.13 per hour
9,000 BTU propane (Mr. Heater Portable Buddy): About 25 cents per hour
18,000 BTU propane (Mr. Heater Big Buddy): About 50 cents per hour
60,000 BTU propane (Mr. Heater 60K): About $1.50 per hour
45,000 BTU natural gas (Modine Hot Dawg): About 50 cents per hour
Natural gas is the cheapest per BTU, then propane, then electric. But installation costs can flip the math. Running a new electrical circuit costs $200 to $400 while running a new gas line costs $500 to $2,000.
Frequently Asked Questions
What is the best type of heater for an unheated garage?
For most homeowners, an electric 240V heater like the DR Infrared DR-975 offers the best balance of installation simplicity, safety, and heating capacity for unheated garages. If you have a natural gas line available, a natural gas unit like the Modine Hot Dawg provides the lowest operating costs. For portable or no-installation options, the Mr. Heater Portable Buddy or Big Buddy work well for smaller spaces.
How many BTU do I need to heat a 2-car garage?
A standard 2-car garage (20×20, 400 sq ft) needs between 12,000 and 25,000 BTU to heat effectively in cold weather. For uninsulated garages in cold climates, aim for the higher end. The Dura Heat EUH4000 (12,800 BTU), Comfort Zone CZ230ER (25,600 BTU), and VEVOR 7500W (25,600 BTU) all fit this BTU range.
Are electric garage heaters safe to leave on all night?
Modern electric garage heaters with overheat protection are generally safe for extended operation, but most manufacturers recommend against leaving them unattended for long periods. The DR Infrared DR-975, Comfort Zone CZ230ER, and VEVOR 7500W all include overheat shutoff. For overnight use, choose a unit with UL/CUL certification and ensure your electrical wiring is properly rated for continuous load.
How much does it cost to run a 1500 watt garage heater?
At the US national average electricity rate of about 15 cents per kWh, a 1,500 watt heater costs approximately 23 cents per hour to run. Running it for 8 hours costs about $1.80. At higher electricity rates (20 cents per kWh or more), expect around 30 cents per hour. The Heat Storm HS-1500-PHX-WIFI is a 1,500W option with accurate thermostat control that prevents wasteful over-heating.
Are propane heaters safe for garages?
Propane heaters are safe for garage use when they include proper safety features and you maintain adequate ventilation. Look for units with oxygen depletion sensors (ODS) and tip-over protection. Every Mr. Heater propane unit in this guide includes both features. Never run a propane heater in a completely sealed garage since combustion consumes oxygen and produces carbon monoxide. Always keep a garage door or window partially open for ventilation.
Final Verdict
After testing all 10 heaters across different garage sizes and conditions, our top recommendation for the best space heaters for garages depends on your specific situation. For most homeowners, the DR Infrared DR-975 delivers the best combination of heating capacity, reliability, and features. At 7,500 watts with remote thermostat control, it handles most 2-car and 3-car garages without breaking the bank.
For portable use or smaller spaces, the Mr. Heater Portable Buddy remains my top pick. It’s saved my bacon more times than I can count when working in my unheated garage during winter. If you have a natural gas line, the Modine Hot Dawg justifies its higher price with serious heating performance and 80 percent efficiency.
Whatever you choose, make sure to match the BTU output to your garage size, verify your electrical or gas service can handle the unit, and never skip safety features. With the right best space heaters for garages setup, you’ll be working comfortably in your garage year-round. Check the latest prices and grab one before the cold weather hits.