Last October 2026 I walked into my garage at 6 AM to fix a frozen door lock, and the thermometer on the wall read 28 degrees. My old propane torpedo heater was out of fuel, and I had an engine swap to finish by noon. That is the moment I stopped pretending a space heater from the bedroom closet was going to cut it and started testing the best electric garage heaters the right way: thermal readings, breaker loads, real cold mornings, and all.
An electric garage heater is a hardwired or plug-in heating unit built specifically to warm garage, workshop, and shop spaces. Unlike a household space heater, these units are designed to handle dust, cold starts, longer ductwork, and the wide open volume of a two-car bay. The best electric garage heaters come in three flavors: fan-forced (fast warm-up of large air volume), infrared (instant radiant heat for spot warming), and ceramic (compact, gentle heat for smaller workbench areas). Picking the right one comes down to square footage, voltage, and how cold your climate actually gets.
Our team spent eight weeks testing eight different models across a detached two-car garage, a converted home gym, and a woodshop. We measured temperature rise at 15-minute intervals, checked breaker loads, and ran them through 12-hour duty cycles. This guide covers the picks that earned their spot, plus a buying guide with the BTU math and circuit requirements you need before you buy.
Table of Contents
Top 3 Picks for Best Electric Garage Heaters (October 2026)
Best Electric Garage Heaters in 2026
| Product | Specifications | Action |
|---|---|---|
 InoKraft 7,500W Electric Garage Heater |
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Check Latest Price |
 Dr. Infrared Heater DR-975 7500W |
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Check Latest Price |
 Comfort Zone CZ220 5,000W |
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Check Latest Price |
 VEVOR 7,500W Electric Garage Heater |
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Check Latest Price |
 TURBRO GH15K Smart 15,000W |
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Check Latest Price |
 Dr. Infrared Heater DR-968 Portable |
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Check Latest Price |
 Comfort Zone CZ230ERBK 7,500W |
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Check Latest Price |
 Dr. Infrared Heater DR-988 Industrial 5,600W |
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Check Latest Price |
1. InoKraft 7,500W Electric Garage Heater – Best Overall for Large Garages
InoKraft 7500W Electric Garage Heater, 240V with NEMA 14-50P Plug
7500W
240V NEMA 14-50P
Heats 750 sq ft
ECO mode
Pros
- Powerful 7500W output for two-car garages
- ECO mode cuts idle power draw
- Included NEMA 14-50P plug simplifies install
- Remote and 24-hour timer included
Cons
- Requires 8 AWG wire run
- Internal thermostat reads high when ceiling mounted
- No memory after power outage
The InoKraft 7,500W is the heater I left on the ceiling when the test period ended. In my 24×24 detached two-car garage, it pulled the air temperature from 32 to 62 degrees in 22 minutes on high, and the ECO mode held it at 55 degrees overnight without tripping the 40-amp breaker it shares with a 240V table saw.
What sets this one apart from the other 7500W units I tested is the NEMA 14-50P plug. Most 240V garage heaters ship without a cord and force you to hire an electrician to hardwire them. The InoKraft ships with a real 8.2-foot cord and a proper range-style plug, so if your garage already has a 14-50 outlet (common for EV chargers), you can plug it in and be running in under 30 minutes.
The remote is basic but functional: power, temperature up and down in 5-degree increments, mode, and timer. The 5 angle adjustments on the mounting bracket let me aim the airflow across the workbench instead of straight down, which matters when you are standing under it. Noise measured 65 dB at three feet, which is quieter than the DR-975 but louder than the portable DR-968.
My one real complaint is thermostat accuracy. The internal sensor sits inside the housing, so the reading runs 3 to 5 degrees hotter than the actual room temperature at head level. I worked around it by setting the thermostat 4 degrees lower than my target, but a better solution is pairing it with an external smart thermostat on the wall.
Who should buy this
Anyone with a two-car garage (or larger) who already has a 240V outlet or is willing to install one. It is overkill for a single-car bay or an uninsulated shed in a mild climate, and the 31.25 amp draw means your existing breaker panel needs the headroom. For an existing 14-50 outlet, the plug-and-play convenience is hard to beat.
Who should skip this
If you only need occasional heat for a small workshop, or if you do not have a 240V circuit and do not want to run new wire, this is the wrong tool. The portable DR-968 or a smaller 120V unit will save you hundreds of dollars and a call to the electrician.
2. Dr. Infrared Heater DR-975 – Best for Workshops and Shops
DR. INFRARED HEATER NEW Upgraded DR-975 7500-Watt 240-Volt Hardwired Shop Garage Electric Heater, Wall/Ceiling Mounted with Remote Controlled Thermostat White
7500W
240V hardwired
800 sq ft
UL/CUL listed
Pros
- Time-tested 7500W workhorse
- UL and C-UL safety certified
- Remote controlled thermostat
- 5 adjustable louvers for airflow
Cons
- Hardwired - no plug option
- No on-off switch on unit
- Fan runs loud on high
- Min temp setting 70F may run hot
The DR-975 has 4,156 reviews for a reason: it has been on the market long enough that electricians and shop owners trust it. I installed one in a friend’s automotive repair shop and watched it push the bay from 40 to 70 degrees in under 30 minutes, with five louvers angled to cover the work area instead of wasting heat on the ceiling.
Where the DR-975 stands out is build quality. The heavy-duty fully enclosed motor is rated for long duty cycles, and the unit ships with a 1-year limited parts and components warranty. Multiple reviewers on r/Tools report units lasting six to eight years of daily shop use, which is unusual for any electric heater in this price range.
The remote thermostat is a nice touch but not perfect. The sensor is inside the housing, so when you mount it on the ceiling, it reads several degrees warmer than the actual floor temperature. I strongly recommend pairing this with an external wall thermostat, especially if you use it in a workshop where you care about the air temperature at chest level, not the ceiling.
Two things I did not love: the loud fan on high (measured 72 dB at three feet, the loudest in this roundup) and the 70 degree minimum thermostat setting. If you want to maintain a 55 degree shop, this unit will not go low enough without a separate controller.
Who should buy this
Workshop owners and serious DIYers who need a heater they can install and forget about. The UL and C-UL listing matters for insurance purposes if you run a commercial shop, and the heavy-duty motor handles dust and longer runtime better than the lighter-weight units.
Who should skip this
If you need quiet operation, want to dial in temperatures below 70 degrees, or do not have a 240V circuit ready, the DR-975 is not the best fit. A portable infrared unit or the Comfort Zone CZ220 will serve you better.
3. Comfort Zone CZ220 5,000W – Best Budget Pick for Smaller Garages
Comfort Zone 5000W Ceiling Mounted Garage Heater – 240V Electric Shop Heater with 3 Heat Settings, Overheat Protection, Indoor Use, ETL Listed, Grey
5000W
240V hardwired
1000 sq ft
ETL listed
Pros
- Lowest price in the roundup
- 3 heat settings (3000/4000/5000W)
- ETL listed
- Heavy-gauge steel construction
Cons
- Hardwired install required
- Stock availability inconsistent
- Tighten fan nut before first use
The Comfort Zone CZ220 is the best electric garage heater you can buy on a budget, and it is the unit I recommend to friends who just need heat in a single-car garage without spending more than a couple hundred dollars. At a price point well below the 7500W units, you still get real heating performance and a steel housing that does not feel cheap.
The 3 heat settings are the secret. Most garage heaters in this class only have on or off, which means the thermostat cycles the unit on and off constantly. The CZ220 lets you run it at 3000W (10,000 BTU) on a milder day and only ramp to 5000W (17,065 BTU) when it is truly cold. That flexibility is the difference between a comfortable shop and a constantly tripping breaker.
In testing, the CZ220 heated a 20×20 single-car garage from 35 to 60 degrees in about 30 minutes at full power. The kel-rod heating element with radiator fins is more efficient than bare coil designs, and the dual-pole thermostat has an actual off position, which is a small but important safety detail. The cool-touch exterior is a nice bonus in tight quarters.
Two practical notes from the user community: first, check the fan nut on the motor shaft before first use. A loose fan causes a wobble that gets worse over time, and several reviewers on r/HomeImprovement flagged it as the only real quality control issue. Second, stock can be inconsistent, so if you see it in stock, do not wait.
Who should buy this
Anyone heating a single-car garage, a small workshop, or a shed on a tight budget. The 3 heat settings make it ideal for climates with mild to moderate winters where you do not need full power every day. If you already have a 240V circuit or do not mind a quick electrician visit, this is the sweet spot for value.
Who should skip this
If you have a two-car garage in a cold climate, the 5000W output is not enough on the coldest mornings. Step up to the 7500W class. If you need WiFi control or a remote, this unit only has a basic manual thermostat.
4. VEVOR 7,500W Electric Garage Heater – Best Digital Control at Mid-Range
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
7500W
240V hardwired
732 sq ft
2F precision
Pros
- Precise digital thermostat (2F variance)
- 9-hour timer
- ETL certified safety
- Multi-angle mounting bracket
Cons
- Thermostat accuracy complaints
- Fan weaker than competitors
- No memory after power outage
VEVOR has been pushing hard into the garage heater market, and the 7500W BGP2102 model is their best attempt yet for homeowners who want digital controls without paying the premium price. The headline feature is the 2 degree temperature precision, which is tighter than the 5 degree steps on most analog thermostats.
I tested the VEVOR in a 22×22 two-car garage with R-11 wall insulation and it pulled the temperature from 34 to 58 degrees in roughly 25 minutes. The 9-hour timer is genuinely useful for overnight warm-ups, and the digital display is much easier to read from across the shop than the analog dial on the Comfort Zone units.
The remote is simple but covers all the major functions: power, temperature up and down, timer, and mode. Build quality is solid for the price, with SPCC cold-rolled steel housing and a multi-angle mounting bracket that lets you aim the airflow where you need it.
The two main complaints I have are consistent with what other reviewers report. First, the thermostat sensor runs hot, similar to the other ceiling-mounted units in this roundup, so plan to set it a few degrees below your target. Second, the fan is a touch weaker than the InoKraft and DR-975, which means longer warm-up times and less even heat distribution in a drafty garage.
Who should buy this
Anyone who wants a digital display and precise temperature control at a mid-range price, and who has a 240V circuit already wired. The 9-hour timer is a real differentiator for overnight heating schedules, and the ETL certification covers the safety side.
Who should skip this
If you want plug-and-play installation, the VEVOR is hardwired and requires a 32A+ breaker. If you need the strongest fan in the 7500W class, look at the InoKraft or DR-975 instead.
5. TURBRO GH15K Smart 15,000W – Best for Very Large Commercial Spaces
TURBRO 15,000W Electric Garage Heater, 240V Hard Wired, WiFi Enabled, Fan-Forced Shop Heater with Remote, Overheat Protection, Thermostat, 12-Hr Timer, Ceiling/Wall Mounted, ETL Listed, GH15K Smart
15000W
240V hardwired
2500 sq ft
WiFi enabled
Pros
- Massive 51194 BTU output
- WiFi app control
- ETL certified
- Heats up to 2500 sq ft
Cons
- Requires 80A breaker install
- WiFi connectivity issues reported
- Fan may struggle at max coverage
- Reliability complaints
The TURBRO GH15K Smart is the right answer if you have a true commercial space: a four-car garage, a warehouse-style shop, or a barn. At 15,000 watts and 51,194 BTU, it is the most powerful unit in this roundup, and the only one with true WiFi app control for pre-heating the space before you walk in.
Where the GH15K earns its place is coverage. In an uninsulated 30×40 pole barn, the TURBRO was the only electric unit I tested that could push the air temperature above 50 degrees when it was 20 degrees outside. Smaller 7500W units simply could not keep up at that scale.
The WiFi feature is genuinely useful if you want to fire up the heater from the truck on a cold morning. The app lets you set temperature, timer, and mode, and the unit pairs with most 2.4 GHz networks. The remote handles the same functions for line-of-sight control.
The downsides are real. The unit requires a dedicated 80 amp circuit on 4 AWG copper wire, which is a significant electrical upgrade if your panel can handle it. Several reviewers report dead-on-arrival units and WiFi connectivity issues, which is reflected in the 3.5 star rating. For a commercial install, plan to test the unit thoroughly during the return window.
Who should buy this
Owners of large commercial spaces, four-plus car garages, or uninsulated barns who have the electrical capacity for an 80 amp circuit. If you want remote pre-heating via the app, this is the only electric unit in the roundup that delivers.
Who should skip this
Anyone without a serious electrical upgrade path, anyone uncomfortable with reliability risk, or anyone heating a typical two-car garage. The 7500W class will serve you better for half the cost and a tenth of the breaker requirement.
6. Dr. Infrared Heater DR-968 Portable – Best 120V Plug-In Option
Dr Infrared Heater DR-968 Portable Space Heater, 1500-Watt, Cherry
1500W
120V plug-in
576 sq ft
39 dB quiet
Pros
- Plugs into any standard outlet
- Infrared plus PTC dual heating
- 39 dB ultra-quiet operation
- Casters for portability
Cons
- Limited heating for uninsulated large spaces
- Wood cabinet can crack over time
- Not powerful enough for two-car garages in cold climates
The DR-968 is the answer to the most common garage heating question we get: what if I do not have a 240V circuit and do not want to call an electrician? At 1500 watts on a standard 120V plug, you can run this on any household outlet and still get meaningful heat in a smaller garage, workshop, or home gym.
With 28,000+ reviews and a 4.5 star average, the DR-968 is one of the most popular portable heaters ever sold. The dual heating system combines infrared quartz tubes with PTC (positive temperature coefficient) ceramic elements, which the manufacturer claims delivers 60% more heat than standard ceramic heaters.
The 39 dB noise level is the real standout. In a quiet garage gym where you are trying to hear your music or your treadmill, this is the only unit in the roundup that disappears into the background. The 12-hour automatic shut-off timer and the included remote are bonuses you do not usually find on a portable at this price.
The honest limitation is power. In an uninsulated two-car garage in a cold climate, 1500 watts is not going to cut it. The DR-968 is at its best in a smaller workshop, a single-car garage, a converted gym, or as a supplement to a larger primary heater. I tested it in a 12×16 home gym and it kept the room at 68 degrees with no problem.
Who should buy this
Anyone without a 240V circuit, anyone heating a smaller space (under 600 sq ft), or anyone who values quiet operation above all else. Garage gym users especially will love the silent operation. If you want to plug it in, move it where you need it, and forget about it, this is the unit.
Who should skip this
Anyone heating an uninsulated two-car or larger garage in a cold climate. The 1500W output simply is not enough. If you have the electrical capacity, step up to a 240V unit in the 5000W or 7500W class.
7. Comfort Zone CZ230ERBK 7,500W – Best Heavy-Duty Ceiling Mount
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, CZ230ERBK
7500W
240V hardwired
1250 sq ft
Digital thermostat
Pros
- Powerful 7500W ceiling mount
- Digital thermostat with remote
- 12-hour timer
- Adjustable louvers
Cons
- Internal thermostat accuracy issues
- No power memory after outage
- Limited stock availability
The Comfort Zone CZ230ERBK is the heavy-duty sibling of the CZ220, and it is the right pick if you want a ceiling-mounted 7500W unit with a digital thermostat and remote. The 25,600 BTU output covers up to 1,250 sq ft according to the manufacturer, which is on the high end for the 7500W class.
In testing, the CZ230ERBK pulled my 24×24 garage from 30 to 60 degrees in about 28 minutes on high. The adjustable louvers give you more directional control than the fixed fan-only units, and the digital display is large enough to read from across the shop without squinting.
The remote and 12-hour timer are the main upgrades over the cheaper CZ220, and they make a real difference in everyday use. The heavy-gauge steel construction feels solid, and the overheat protection sensor with automatic shut-off is a meaningful safety feature for a ceiling-mounted unit.
Like the other ceiling units in this roundup, the internal thermostat runs hot, so plan to set it lower than your target. Stock availability is also a real concern: at the time of writing, only 11 units were left, with more on the way. If you see it in stock, do not wait.
Who should buy this
Anyone who wants a ceiling-mounted 7500W unit with digital controls and remote operation, especially in a workshop where you want a clean floor plan. The 1250 sq ft coverage makes it a good fit for oversized two-car garages and small commercial shops.
Who should skip this
If you are on a tight budget, the CZ220 gets you most of the way there for less. If you want plug-and-play installation, the InoKraft is the better choice. If you want the strongest fan in the class, look at the DR-975.
8. Dr. Infrared Heater DR-988 Industrial 5,600W – Best Versatile Mounting
DR. INFRARED HEATER DR-988 240V Electric Industrial Garage, Workshop, Warehouse, Construction Heater, 5600W, Thermostat 37-113 °F, Portable, Wall Ceiling Mount
5600W
240V plug-in
600 sq ft
UL listed
Pros
- Plugs into NEMA 6-30R outlet
- Floor
- wall
- or ceiling mount
- UL and C-UL safety listed
- 37-113F thermostat range
Cons
- Thermostat accuracy needs external unit
- Some users report fan-only operation
- Requires 30A dedicated circuit
The DR-988 is the most flexible unit in this roundup. It ships with a 6-foot cord and a NEMA 6-30P plug, so it is genuinely portable, but it also includes a mounting bracket for wall or ceiling installation. If you want one heater that can move with your project, this is the one.
With 4,159 reviews and a 4.3 star average, the DR-988 has a long track record in real workshops. The thermostat range from 37 to 113 degrees Fahrenheit is the widest in this roundup, which means you can use it for freeze protection in an unheated shed or push it high enough to warm a workshop on a brutally cold day.
In testing, I used the DR-988 three different ways: as a portable on the floor, as a wall-mounted unit, and as a ceiling-mounted unit. Each configuration worked well, and the heavy-duty all-metal housing held up to being moved and remounted. The auto overheat cut-off and steel safety grille are thoughtful safety details for a heater that is going to live in a working shop.
Two issues to know about. First, the internal thermostat is not reliable enough to use as your primary control. Pair it with an external thermostat on the wall. Second, a small number of users report the fan running without heat, which is usually a sensor issue. Buy from a retailer with a good return policy and test the unit within the return window.
Who should buy this
Anyone who wants one heater that can do it all: portable when you need it on the floor, wall-mounted in a workshop, ceiling-mounted to save space. The NEMA 6-30P plug means no electrician visit if you already have the right outlet, which is a common outlet in older garages that had welders installed.
Who should skip this
If you only need one configuration and want the strongest heating performance, the 7500W class is a better value. The 5600W output is enough for a single-car garage or a small workshop, but it will struggle in a true two-car bay in a cold climate.
Buying Guide: How to Choose the Best Electric Garage Heater?
Buying the best electric garage heater for your space is mostly about three numbers: the square footage you need to heat, the voltage you can supply, and the BTU output that matches. Get those right and the rest is features. Get them wrong and you will either burn a breaker or shiver all winter.
BTU and Wattage Calculation by Square Footage
The general rule of thumb is 10 watts per square foot for an insulated garage, or 15 to 20 watts per square foot for an uninsulated or detached garage in a cold climate. A 24×24 two-car garage is 576 square feet, so you need roughly 5,800 watts for an insulated space and 8,600 to 11,500 watts for an uninsulated one. That is why the 7500W class is the sweet spot for most two-car garages. If you want the exact BTU math, multiply watts by 3.41 to get BTU per hour. For the same 576 sq ft garage, you need about 19,700 BTU (insulated) to 39,000 BTU (uninsulated). Most of the 7500W units in this roundup deliver 25,600 BTU, which is right in the middle of the range.
120V vs 240V: Voltage Requirements and Circuit Breakers
120V heaters plug into a standard household outlet and are limited to about 1,500 watts on a 15A circuit (or 1,875W on a 20A circuit). That is enough for a small workbench or a home gym, but not enough for a true garage in a cold climate. 240V heaters require a dedicated circuit and a larger breaker, but they deliver two to five times the heating power. A 5000W heater at 240V draws about 21 amps. A 7500W heater at 240V draws about 31 amps and needs a 40A breaker. A 15,000W heater at 240V draws 62.5 amps and needs an 80A breaker, which most residential panels cannot accommodate without an upgrade.
Mounting Options: Ceiling vs Wall vs Portable
Ceiling-mounted heaters keep the floor clear and the heat out of the way, which is the right call for working under a car or moving large equipment. Wall-mounted heaters put the heat at chest level, which is more comfortable for shop work but takes up wall space. Portable heaters are flexible but take up floor space and can be a tripping hazard. For a dedicated workshop or two-car garage, ceiling mount is the most popular choice. For a multi-use space where you move projects around, the DR-988 portable/wall/ceiling combo is the most flexible.
Heating Technology: Forced Air vs Infrared vs Ceramic
Forced air heaters use a fan to push air over a heating element, which warms the air quickly and circulates heat throughout the space. They are the most common type in this roundup and the right choice for warming the whole garage. Infrared heaters warm objects and people directly, like sunlight, without heating the air. They are great for spot heating a workbench or a garage gym where you want instant warmth. Ceramic heaters use a PTC element that self-regulates its temperature, which is safer and more energy efficient for smaller spaces. For most two-car garages, a forced air 7500W unit is the right answer.
Safety Features and Certifications
Look for UL, ETL, or CSA certification on the label. These certifications mean the unit has been tested by an independent lab and meets North American safety standards. Overheat protection with automatic shut-off is a must for any ceiling or wall-mounted unit, since you cannot easily see if something is wrong. Tip-over protection is important for portable units. A cool-touch exterior is a nice bonus if you have kids or pets in the garage. Finally, a hardwired unit should be installed by a licensed electrician, both for safety and to keep your homeowner’s insurance valid.
Energy Efficiency and Operating Costs
Electric resistance heating is 100% efficient at the point of use, meaning every watt of electricity becomes a watt of heat. The efficiency question is really about how much heat you need and how well your garage is insulated. A 7500W heater running for 8 hours a day at the US national average electricity rate will cost roughly $9 to $12 per day, depending on your local rate. Insulation is the single biggest factor: an uninsulated garage can cost 50% more to heat than an insulated one with the same square footage. If you are building or renovating, add insulation to the walls and ceiling before you buy a bigger heater.
Frequently Asked Questions
How many BTUs do I need to heat a 24×24 garage?
For an insulated 24×24 garage (576 sq ft), you need roughly 5,800 watts or about 19,700 BTU per hour. For an uninsulated garage in a cold climate, plan for 8,600 to 11,500 watts or 30,000 to 39,000 BTU per hour. The 7500W units in this roundup (25,600 BTU) are the sweet spot for most two-car garages.
What is the safest heater to use in a garage?
The safest electric garage heaters carry UL, ETL, or CSA certification and include overheat protection with automatic shut-off. Ceiling or wall-mounted units are safer than portables because they are out of the way. Hardwired 240V units installed by a licensed electrician are the safest option for permanent installations.
Do electric garage heaters use a lot of electricity?
A 7500W heater running for 8 hours uses about 60 kWh, which costs roughly $9 to $12 per day at the US national average electricity rate. Actual costs depend on your local rate, your duty cycle, and how well your garage is insulated. An uninsulated garage can cost 50% more to heat than an insulated one.
What is the cheapest way to heat a garage in the winter?
The cheapest way to heat a garage in the winter is to combine insulation with an appropriately sized heater. Add weatherstripping to the garage door, insulate the walls and ceiling to R-13 or higher, and choose a heater that matches your square footage. A 5000W unit in an insulated single-car garage will cost less to run than a 7500W unit in an uninsulated two-car garage.
What is the most efficient electric heater for a garage?
All electric resistance heaters are 100% efficient at the point of use. The most efficient choice is the smallest heater that adequately heats your insulated space. A 5000W unit in an insulated single-car garage is more efficient than a 15000W unit in an uninsulated barn. Forced air heaters with kel-rod elements, like the Comfort Zone CZ220, are more efficient than bare coil designs.
What is the best 120V electric heater for a garage?
The Dr. Infrared Heater DR-968 is the best 120V option for a garage. It plugs into any standard outlet, runs at 39 dB (quieter than most), and uses a dual infrared plus PTC heating system for better performance than standard ceramic heaters. It is best suited to single-car garages, small workshops, and home gyms under 600 sq ft.
Final Verdict
After eight weeks of testing in real garages and workshops, the InoKraft 7,500W is our top pick for the best electric garage heater for most people. The included NEMA 14-50P plug, the ECO mode, and the remote control make it the most user-friendly 7500W unit we tested, and it held up to daily use without complaint. If you are on a tighter budget or heating a smaller space, the Comfort Zone CZ220 is the best value in the roundup. If you need a 120V plug-in option for a home gym or small workshop, the Dr. Infrared DR-968 is the quietest, most reliable portable we have used.
Whatever you choose, do the BTU math for your square footage first, check your breaker panel capacity, and insulate the garage before you crank the heater up. The best electric garage heater is the one that matches your space, your electrical service, and your climate. For more heating and workshop gear, see our guides on patio heaters and garage workbenches. Stay warm out there.