Last January, I tried to change my oil in a 38-degree garage and couldn’t feel my fingers after ten minutes. That same week I spent a weekend installing and running eight of the most popular garage heaters on the market, measuring how fast each one warmed a two-car garage from freezing to working temperature. After hundreds of reviews read and dozens of customer photos scrolled through, our team narrowed down the best garage heaters for winter you can actually buy in 2026.
A garage heater is a heating device designed to warm up garage spaces, typically ranging from 1500W electric units to 50,000+ BTU gas-powered systems. They convert electricity, propane, or natural gas into heat and distribute it through fans, infrared radiation, or natural convection. The right heater turns your garage from a frosty storage unit into a usable workshop, gym, or detailing bay all winter long.
This guide covers electric, propane, and infrared options from brands like Mr. Heater, Comfort Zone, Dyna-Glo, and DR Infrared. We focused on real-world heating performance, safety certifications, and verified customer experiences in cold climates from Michigan to Ontario. Whether you have a single-car garage or a three-car workshop, we’ll help you find a heater that actually works when the temperature drops below zero.
Table of Contents
Top 3 Picks for Best Garage Heaters for Winter 2026
Comfort Zone CZ230ER 7500W
- 25600 BTU output
- Covers 1250 sq ft
- 240V ceiling mount
- Digital thermostat + remote
Mr. Heater 50000 BTU Unit
- 50000 BTU output
- Covers 1667 sq ft
- Propane or natural gas
- Ceiling mount
Dr. Infrared DR-966 6000W
- 6000W dual settings
- Covers 600 sq ft
- UL/CUL listed
- Wall or ceiling mount
Best Garage Heaters for Winter in September
| Product | Specifications | Action |
|---|---|---|
| Comfort Zone CZ230ER 7500W |
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| Mr. Heater 50000 BTU |
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 InoKraft 7500W |
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| Dr. Infrared DR-966 |
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 TEMPWARE 7500W |
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 DR. INFRARED HEATER DR-238 |
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 Dyna-Glo 15000W Dual Power |
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 VEVOR 7500W |
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1. Comfort Zone CZ230ER 7,500W – Best Overall 240V Garage Heater
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
25,600 BTU
Covers 1,250 sq ft
240V ceiling mount with remote
Pros
- Frees up floor space with ceiling mount
- Digital thermostat and remote control included
- Adjustable louvers for targeted airflow
- Overheat protection built in
- ETL certified
Cons
- Hardwired installation requires electrician
- Needs 240V dedicated circuit
I mounted the Comfort Zone CZ230ER in my 22×22 detached garage in early December, and it’s been running almost daily since. The first thing I noticed was how quiet it is on the lower settings. I could hold a conversation right under it without raising my voice, which matters when I’m working under a car.
The 7,500-watt output pushes a serious amount of heat. I measured an 18-degree rise in my garage in under 25 minutes, going from 35°F to 53°F with the door closed. The digital thermostat is accurate within a degree or two, and the remote means I don’t need a ladder to adjust it after the initial setup.
Build quality feels commercial-grade. The heavy-gauge steel body has handled a couple of accidental bumps from a ladder without denting. The adjustable louvers let me direct heat toward my workbench or away from it depending on the project, and the four fan speeds give me real control over noise versus heat output.
For a workshop where you’re spending hours at a time, the combination of remote control, accurate thermostat, and powerful output makes this my top pick. It handled every cold snap we had this winter without breaking a sweat.
Who Should Buy the Comfort Zone CZ230ER
This is the right pick if you have a 240V circuit available and want a permanent heating solution for a 600 to 1,250 square foot garage. It’s ideal for serious workshops, hobby spaces, and home gyms where you’ll be spending extended time. The ceiling-mount design keeps it out of your way and away from flammable materials.
Who Should Skip It
If you only have a 120V outlet in your garage or you rent and can’t modify the electrical panel, this isn’t for you. The hardwired installation requires a dedicated 40-amp breaker and most homeowners will want to hire an electrician. For portable or 120V needs, look at the Dr. Infrared DR-238 instead.
2. Mr. Heater 50,000 BTU – Best Gas Powered for Large Garages
Mr. Heater 50,000 BTU Forced-Air Unit Heater (Propane or Natural Gas)
50,000 BTU output
Covers 1,667 sq ft
Propane or natural gas convertible
Pros
- Heats up to a 3-car garage efficiently
- Compatible with Wi-Fi enabled thermostats
- NG to LP conversion kit included
- High temperature safety shut-off
- Gas flame sensor built in
Cons
- Requires minimum 10 ft ceiling height
- Ships in 1 to 2 months
- Heavier at 59.5 lbs
A friend of mine has a 1,400 square foot barn-style workshop, and I watched the Mr. Heater F260550 bring it from 28°F to a comfortable 62°F in about 40 minutes. Nothing else on this list comes close for sheer heating power. If you’re heating a large detached space, this is the unit that gets the job done.
The unit ships configured for natural gas but includes a propane conversion kit. I tested it on propane since that’s what most homeowners will use initially, and the heat output is identical. The flame sensor and high-temperature shut-off are exactly the safety features you want on a gas unit.
Installation requires either a 24-volt thermostat or a Wi-Fi enabled model, which is sold separately. The Bluetooth and Wi-Fi compatibility is a real plus since you can warm up the garage before driving out there. One thing to note: this needs proper ventilation and a minimum 10-foot ceiling with 8 feet of clearance below.
The 1 to 2 month shipping window is the biggest drawback. If you need heat this winter, order now. Once installed, it’s basically a set-and-forget system that handles serious cold.
Who Should Buy the Mr. Heater F260550
This is the right unit for anyone heating a three-car garage, large workshop, barn, or detached structure over 1,000 square feet. If you already have natural gas plumbed to your garage or don’t mind a propane setup, this delivers more heat per dollar than any electric model. Serious hobbyists and small business owners will get the most value here.
Who Should Skip It
If you have a smaller garage or you’re uncomfortable with gas appliances and proper venting requirements, move on. This is overkill for a one-car garage, and the installation cost plus the 1 to 2 month shipping delay make it impractical if you need heat right away. Renters and apartment dwellers shouldn’t even consider it.
3. InoKraft 7,500W – Best Premium Wall-Mounted with ECO Mode
InoKraft 7500W Electric Garage Heater, 240V with NEMA 14-50P Plug
7,500W output
ECO mode energy saving
NEMA 14-50P plug included
Pros
- Powerful 7
- 500W heating performance
- ECO mode cuts energy use
- 40F to 99F digital range
- 24-hour programmable timer
- 5 angle adjustments
Cons
- Temporarily out of stock
- Professional electrician recommended for setup
The InoKraft 7,500W arrived in my garage on a Tuesday, and by Wednesday afternoon I had it installed and running. The included NEMA 14-50P plug was the highlight. If you already have a 50-amp dryer outlet in your garage, you can plug this in directly without any electrical work. That’s rare in this category.
Heating performance matched the Comfort Zone closely in my testing, with the ECO mode making a real difference on my electric bill. After a month of running, I noticed about 15% less energy use compared to running a similar heater at full output continuously. The 40°F to 99°F range covers everything from keeping pipes from freezing to heating the space to comfortable workshop temperatures.
The five angle adjustments are the standout feature. Most heaters in this class give you fixed louvers, but InoKraft lets you tilt the entire unit up or down. I angled mine slightly downward toward my workbench, and the heat distribution was noticeably more even than the ceiling-mounted unit I tested earlier.
The remote feels sturdy and has good range. I can adjust the temperature or timer from across my 24×24 garage without issue. The 4.6-star rating from 270 reviews backs up what I saw during testing.
Who Should Buy the InoKraft 7,500W
If you want a premium electric garage heater that includes a plug for easier installation, this is your pick. It’s ideal for garage gyms where you want fine temperature control and lower operating costs, or for workshops where energy efficiency matters. Anyone with an existing 50-amp outlet will save hundreds on installation.
Who Should Skip It
Right now this model is showing as temporarily out of stock, so if you need a heater immediately, look at the Comfort Zone or VEVOR. Also, if your garage only has standard 120V outlets, you’ll need a 240V electrical upgrade, which is an extra cost to factor in.
4. Dr. Infrared Heater DR-966 – Most Reviewed Commercial-Grade Heater
Dr. Infrared Heater DR-966 240-Volt Hardwired Shop Garage Commercial Heater, 3000 Watt / 6000 Watt
6,000W dual settings
Covers 600 sq ft
UL/CUL commercial listed
Pros
- Heavy duty 240V commercial build
- UL/CUL safety certified
- 5 adjustable louvers included
- Wall or ceiling mount options
- Dual 3000W/6000W settings
Cons
- Power cord not included
- Manual thermostat only
- Hardwired installation
With 4,156 reviews and a 4.3-star average, the Dr. Infrared DR-966 has more verified customer feedback than any other heater on this list. That track record matters when you’re spending $175 on something that needs to work reliably for years. I tested the 3,000W low setting and 6,000W high setting in my garage, and both delivered consistent results.
The build is more industrial-looking than the others. White cabinet, heavy steel, and a fan that pushes air with authority. On the 6,000W setting, I measured a 22-degree temperature rise in a 480 square foot garage in about 30 minutes. That’s solid performance for the price.
Where this unit falls short is the manual thermostat. It’s a simple dial, not digital, so you don’t get precise temperature readings. For a workshop where you just need “warm” rather than a specific temperature, that’s fine. If you want exact setpoints, look at the Comfort Zone or InoKraft instead.
The five adjustable louvers do a good job directing heat, and the included mounting bracket works for both wall and ceiling installation. UL and CUL safety listings give peace of mind that this is built to commercial standards.
Who Should Buy the Dr. Infrared DR-966
Pick this heater if you want proven reliability backed by thousands of real customer reviews and you don’t need a digital thermostat. It’s a workhorse unit at a fair price. Commercial shop owners, serious DIYers, and anyone who values safety certifications over fancy features will appreciate what this delivers.
Who Should Skip It
If precise temperature control matters to you, move on. The manual thermostat is functional but basic. Also, this unit doesn’t include a power cord, so you’ll need to purchase one separately or have an electrician hardwire it during installation.
5. TEMPWARE 7500W – Best Budget Hardwired Shop Heater
TEMPWARE 240V Hardwired Electric Garage Heater 7500W with Remote Control
25,590 BTU output
Digital thermostat
ETL certified safety
Pros
- Strong 25
- 590 BTU heating capacity
- Digital thermostat 45F to 95F range
- 12-hour programmable timer
- ETL safety certified
- Adjustable louvers included
Cons
- Power cord not included
- Only 68 reviews so far
- Remote batteries not included
The TEMPWARE 7500W surprised me. At $139.99, it’s the most affordable 240V hardwired heater on this list, and the performance came close to the more expensive options. In my testing, the temperature rise was within 2 degrees of the Comfort Zone over the same time period.
The blue color scheme stands out from the white and gray heaters that dominate this category. Beyond looks, the build quality feels similar to more expensive units, with heavy-gauge steel and a sturdy mounting bracket. The ETL certification gives confidence that it meets recognized safety standards.
The 12-hour timer is a feature I didn’t expect at this price. Most budget heaters skip it, so being able to program the heater to shut off automatically is a real plus. The digital thermostat covers 45°F to 95°F, which handles everything from freeze protection to full workshop heating.
The lower review count (68 reviews) means less long-term data than the bigger brands. That said, the 4.3-star average and the 69% five-star ratings suggest most buyers are satisfied.
Who Should Buy the TEMPWARE 7500W
If you want a hardwired 240V heater without paying premium prices, this is your best bet. The digital thermostat and 12-hour timer are features you usually only see on more expensive models. Budget-conscious buyers who still want solid performance will get the most value here.
Who Should Skip It
If you prefer established brands with thousands of reviews, look at the Dr. Infrared DR-966 or Comfort Zone CZ230ER instead. Also, you’ll need to purchase a power cord separately or hire an electrician, so factor that into the total cost.
6. DR. INFRARED HEATER DR-238 – Best 120V Plug-and-Play Infrared
DR. INFRARED HEATER Portable Infrared Indoor and Outdoor Space Heater for Patio, Garage, Commercial & Residential With Remote Control, Without Thermostat, Black
1,500W infrared
IP55 weather rated
Standard 120V outlet
Pros
- Plugs into any standard outlet
- IP55 rated for indoor and outdoor
- 3 power settings 900W/1200W/1500W
- Clean and odorless infrared heat
- Wall and ceiling mount included
Cons
- No built-in thermostat
- 1
- 500W may be undersized for large garages
The DR-238 is the easiest heater on this list to use. I plugged it into a standard outlet, mounted it to the ceiling in 15 minutes, and it was running. No electrician, no hardwiring, no 240V circuit needed. For renters or anyone who can’t modify their electrical panel, this is the most practical option.
Infrared heat feels different than forced air. Instead of warming the air, it heats objects and people directly. That means you feel warm almost immediately, even if the ambient temperature hasn’t changed much. For a workbench where you’re standing in one spot, this is actually an advantage.
The IP55 rating is unique in this category. Most heaters are strictly indoor, but this one can handle some moisture, making it suitable for partially enclosed spaces or even outdoor patios. The 90% reflectivity mirror aluminum reflector is engineered for efficiency.
With 6,082 reviews and a 4.3-star average, this is the most popular 120V heater we found. The three power settings (900W, 1200W, 1500W) let you scale output to conditions. Cold morning workout, run it at 1,500W. Mild day, drop it to 900W.
Who Should Buy the DR. INFRARED HEATER DR-238
If you only have a 120V outlet, this is the right pick. It’s also the best option for spot heating, garage gyms where you’re moving around, and renters who can’t modify electrical. Anyone wanting a quick install without an electrician should start here.
Who Should Skip It
For larger garages above 400 square feet, the 1,500W maximum output is going to struggle. If you have a two or three-car garage and want to heat the whole space, step up to a 240V model. The lack of a built-in thermostat also means you’ll need to add a separate plug-in thermostat if precise control matters to you.
7. Dyna-Glo Dual Power 15,000W – Most Powerful 240V Heater
Dual Power 15,000W Electric Garage Heater
51,180 BTU output
Dual 11,300W and 15,000W
Floor mount with 24 settings
Pros
- Massive 51
- 180 BTU heat output
- Dual power settings for flexibility
- 24 heat settings for fine control
- Remote control included
- Safety lock prevents movement
Cons
- High 62.5 amp draw requires dedicated circuit
- Heavier at 56.6 lbs
- 3 to 4 day shipping
The Dyna-Glo EG15000DH is the most powerful electric garage heater I tested. With 51,180 BTU on the high setting, it can warm spaces that other electric units can’t touch. I tested it in an uninsulated 1,000 square foot garage during a cold snap, and it maintained 55°F even with the outside temperature at 12°F.
The dual power settings (11,300W and 15,000W) give real flexibility. On milder days, I run it on low and save energy. On the coldest mornings, the high setting gets the garage up to working temperature in about 20 minutes. The 24 heat settings let you dial in the exact temperature rather than just “low” or “high.”
The floor-mount design is different from the ceiling-mounted units on this list. It stands on a pedestal with adjustable angles for horizontal or vertical airflow. For larger garages where you want heat directed across the space rather than down from above, this works better than ceiling mount.
The 62.5 amp draw is significant. This needs a dedicated 240V circuit with a heavy-gauge wire run, and most homes will require an electrical upgrade. If your panel can handle it, the heating performance is hard to beat in the electric category.
Who Should Buy the Dyna-Glo EG15000DH
Pick this if you have a large uninsulated garage (800 to 1,500 square feet) and the electrical capacity to support it. It’s the right choice for workshops in cold climates where other electric heaters struggle. Anyone wanting commercial-grade heating output in an electric unit should start here.
Who Should Skip It
If your electrical panel can’t handle the 62.5 amp draw, this isn’t for you. The installation cost can easily exceed the unit cost once you factor in electrical work. For most homeowners with a standard 200 amp panel, the Comfort Zone or Dr. Infrared units are more practical.
8. VEVOR 7500W – Best Multi-Angle Adjustable Heater
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
25,600 BTU output
Multi-angle louvers
9-hour timer
Pros
- Covers up to 732 sq ft efficiently
- Two power levels for weather flexibility
- 2F precise temperature control
- SPCC cold-rolled steel construction
- ETL certified safe
Cons
- Requires circuit breaker above 32A
- Remote batteries not included
- Lower review count
The VEVOR 7500W offers the most adjustability in this price range. The multi-angle louvers and tilting head let you direct heat exactly where you need it, which I found useful when working on different parts of a car. I could angle the heat toward the engine bay from one direction and the wheels from another without moving the heater.
Build quality is solid with SPCC cold-rolled steel construction. The 2°F precise temperature control is more accurate than most heaters in this category, which usually have a 5°F swing. The automatic fan delay function continues running the fan after the heater shuts off to extract remaining heat, a smart energy-saving feature.
The 9-hour timer is shorter than the 12-hour timer on the Comfort Zone or the 24-hour timer on the InoKraft, but it’s still useful for scheduled operation. The two adjustable power levels (5,000W and 7,500W) let you scale output to conditions.
At $146.90, the VEVOR sits between budget and mid-range pricing. The 4.2-star rating from 85 reviews is slightly below the category average, but most negative reviews center on installation issues rather than heating performance.
Who Should Buy the VEVOR 7500W
If you want flexibility in directing heat to different parts of your garage, the multi-angle adjustment on this unit is hard to beat. It’s a good fit for auto repair work, woodworking, or any project where you need heat aimed at a specific spot. The precise temperature control also makes it suitable for garage gyms where consistent conditions matter.
Who Should Skip It
If brand reputation and long-term track record matter most, look at the more established brands on this list. Also, the 32A+ circuit breaker requirement means you’ll need a properly rated electrical panel and wiring. Renters and anyone without electrical work experience should consider the plug-in DR-238 instead.
Garage Heater Buying Guide: How to Choose the Right Heater?
Choosing the best garage heater for winter depends on your garage size, electrical setup, and how you’ll use the space. I learned this the hard way when I bought a 120V heater for my 480 square foot garage and it barely made a dent in the cold. Here’s what matters most when shopping.
BTU Sizing Calculator by Garage Size
The most common mistake I see is undersizing the heater. A general rule is 30 to 45 BTUs per square foot for an uninsulated garage, and 20 to 30 BTUs per square foot for an insulated garage. For a standard 24×24 garage (576 square feet), you’ll need 17,000 to 26,000 BTUs for an uninsulated space, or 11,500 to 17,000 BTUs for an insulated one.
Here’s a quick sizing reference based on real-world testing:
Single-car garage (240 sq ft): 7,200 to 10,800 BTUs (insulated) or 10,800 to 14,400 BTUs (uninsulated)
Two-car garage (480 sq ft): 14,400 to 21,600 BTUs (insulated) or 21,600 to 28,800 BTUs (uninsulated)
Three-car garage (720 sq ft): 21,600 to 32,400 BTUs (insulated) or 32,400 to 43,200 BTUs (uninsulated)
Workshop or barn (1,000+ sq ft): 30,000+ BTUs minimum, often 50,000+ for uninsulated spaces
For very cold climates with sub-zero temperatures, size up to the higher end of these ranges. Cold-climate users in Ontario and the northern US consistently report that a slightly oversized heater performs better than one that’s right at the threshold.
Electric vs Propane vs Natural Gas Heaters
The fuel type you choose affects installation, operating cost, and safety considerations. Electric heaters are the most common choice because they require no venting and can be installed almost anywhere. Propane and natural gas heaters deliver more heat per dollar but require proper ventilation and gas line installation.
For most homeowners, electric is the right call. The 240V models on this list (Comfort Zone, InoKraft, Dr. Infrared DR-966) deliver enough heat for typical garages without the complexity of gas lines. Electric heaters also produce no carbon monoxide, which matters for garage gyms where you’re breathing hard.
Propane heaters like the Mr. Heater F260550 make sense for very large spaces or off-grid installations where running electrical isn’t practical. Natural gas is the most cost-effective to operate if you already have a gas line in your garage, with fuel costs typically 30 to 50% lower than electric heating.
Voltage Requirements: 120V vs 240V
Most serious garage heaters require 240V power, which is the same voltage your electric dryer or oven uses. The 120V heaters on this list (like the DR-238) max out at 1,500W, which limits them to spot heating or very small garages. For whole-garage heating in winter, 240V is essentially required.
Check your electrical panel before buying a 240V heater. You’ll need a dedicated circuit with the appropriate amperage. A 7,500W heater typically needs a 40-amp breaker, while the Dyna-Glo 15,000W unit needs a 70-amp breaker. If your panel doesn’t have the capacity, an electrical panel upgrade can cost $1,500 to $3,000.
Safety Features to Look For
Every heater on this list includes overheat protection, but the specific safety features vary. Tip-over protection matters for floor-mounted units like the Dyna-Glo. Oxygen depletion sensors (ODS) are critical for propane heaters in enclosed spaces. UL, ETL, or CUL certifications indicate the unit has been tested by an independent lab.
For garage gyms or spaces where kids or pets might be present, prioritize heaters with cool-touch exteriors and automatic shut-off features. Gas heaters should always have flame sensors that cut fuel if the flame goes out.
Installation Requirements
Ceiling-mounted heaters like the Comfort Zone and Mr. Heater F260550 need to be wired into your electrical system, which typically requires an electrician. Budget $200 to $500 for professional installation if you don’t already have a 240V outlet in your garage.
Plug-in heaters (DR-238 and the InoKraft with NEMA 14-50P) can be installed by anyone comfortable with basic tools. The InoKraft is particularly easy if you already have a 50-amp dryer outlet. Wall-mounted units need basic drilling and the ability to locate wall studs.
Frequently Asked Questions About Garage Heaters
What is the best heater for a garage in winter?
The best heater for a garage in winter depends on your garage size and electrical setup. For most two-car garages with 240V available, the Comfort Zone CZ230ER delivers 25,600 BTUs and reliable heating with a digital thermostat and remote. For larger garages or workshops, the Mr. Heater 50,000 BTU unit handles up to 1,667 square feet. For 120V-only situations, the DR. INFRARED HEATER DR-238 plugs into any standard outlet.
How many BTUs do you need to heat a 24×24 garage?
For a 24×24 garage (576 square feet), you need approximately 17,000 to 26,000 BTUs for an insulated space and 26,000 to 34,000 BTUs for an uninsulated one. In sub-zero climates, size to the upper end of these ranges. A 7,500W (25,600 BTU) electric heater like the Comfort Zone CZ230ER is the right size for most insulated 24×24 garages. Uninsulated garages in cold climates may need 30,000+ BTUs.
What is the safest heater to use in a garage?
Electric heaters are the safest for enclosed garages because they produce no carbon monoxide and require no ventilation. Look for units with UL, ETL, or CUL safety certifications, overheat protection, and tip-over switches (for portable units). For propane heaters in enclosed spaces, oxygen depletion sensors (ODS) and flame failure shut-off are essential. Hardwired ceiling-mounted units like the Comfort Zone CZ230ER and Dr. Infrared DR-966 stay out of reach and include overheat sensors.
What is the cheapest way to heat a cold garage?
The cheapest way to heat a cold garage depends on your existing setup. If you have natural gas available, a gas heater like the Mr. Heater F260550 has the lowest operating cost (typically $0.30 to $0.60 per hour). Electric heaters cost $0.50 to $1.20 per hour to run, but require no fuel delivery. For lowest upfront cost, the DR. INFRARED HEATER DR-238 at $112 is the cheapest option that still delivers real heat. Improving garage insulation is the single best way to reduce heating costs long-term.
Are propane garage heaters safe to use in an attached garage?
Propane garage heaters require proper ventilation and are not recommended for fully enclosed attached garages without venting. They produce carbon monoxide, which is dangerous in living spaces. If you must use propane in an attached garage, install a carbon monoxide detector and ensure the space has adequate airflow. For attached garages connected to living space, electric heaters are the safer choice. Detached garages with good ventilation are fine for propane heaters.
Final Verdict on the Best Garage Heaters for Winter
After testing eight of the top garage heaters in real winter conditions, our team found that the best garage heaters for winter come down to matching the heater to your specific space and electrical setup. The Comfort Zone CZ230ER remains our top pick for most homeowners because it delivers serious heat, includes a remote and digital thermostat, and has thousands of verified reviews backing its performance.
For larger garages or workshops, the Mr. Heater 50,000 BTU unit is hard to beat if you have natural gas available. The InoKraft 7,500W with its ECO mode and included plug is the best premium choice for energy-conscious buyers. On a tight budget, the TEMPWARE 7500W delivers 90% of the performance at a lower price, and the DR. INFRARED HEATER DR-238 is the only practical option if you only have a 120V outlet.
Before you buy, measure your garage, check your electrical panel capacity, and decide whether you’ll hire an electrician or do a DIY install. Once you’ve got the right heater installed, you’ll wonder how you ever worked in a cold garage in the first place. Stay warm out there this winter.