The 7 Best Garage Heaters (2026), by Running Cost

The best garage heater for most two car garages is the Dr. Infrared Heater DR-975, a hardwired 240 volt unit rated 4,700 or 7,500 watts with a remote thermostat and five adjustable louvers. We checked every pick on Amazon on 2026-09-19. This page is one stop on our how to winterize your garden checklist.

Watts and BTU are the numbers every listing shouts. Neither is what decides your bill, because the fuel does that before the model gets a say. So this page prices every pick one way the other roundups do not, in dollars per hour to run.

One thing before the list: we make digging spades, not heaters, so nothing here is ours. Every pick is judged on rated output, the power supply it needs, the coverage its own maker claims and its price, all traced to Amazon listings and manufacturer pages pulled on 2026-09-19.

Disclosure: as an Amazon Associate we earn from qualifying purchases. It does not change what we recommend or what you pay. Prices and availability were checked on 2026-09-19 and can change.

Best garage heaters at a glance

That middle column is the whole decision. A standard 120 volt outlet caps a heater at 1,500 watts, a 240 volt receptacle takes you to 5,600, and hardwiring opens up 7,500 plus an electrician's invoice. "Tested by" names only reviewers who set the unit up and ran it, and says so plainly where nobody did.

How we chose these garage heaters

We did not hands-on test these heaters, and no sentence here pretends otherwise. We read the manufacturers' own specifications and manuals against what independent reviewers reported, then priced the result. Where a manual and a listing disagree, the manual wins and we say so.

Two of the roundups we read actually ran the machines: Bob Vila and Car and Driver. Three did not, and it is worth knowing which is which: Popular Mechanics states on its own page that it did not test what it lists, Family Handyman rests its picks on an interview with an HVAC professional, and Garage Gym Reviews polled a Facebook community and then consulted experts. All seven picks are on one of those lists.

Where a reviewer's model sits in the second tier further down instead of being a pick, the entry says why: we could not buy it, we could not verify enough of it, or a pick beats it on cost, size or both. One case is the reverse and worth flagging here: our value pick is the heater Bob Vila crowned, bought under a second ASIN because that is the one in stock.

Two the consensus wanted did not survive the stock check. The Heat Storm HS-6000-GC, which Family Handyman and Popular Mechanics both put near the top, returned no purchasable Amazon record at all on 2026-09-19. Neither NewAir garage model cleared the bar either.

The best garage heaters, by job

1. Dr. Infrared Heater DR-975: the best garage heater overall

The Dr. Infrared Heater DR-975 (ASIN B01M8KXXAB) wins on the one thing the sizing table below actually asks for. A 20 by 20 two car garage wants about 4,500 watts, and this is the only hardwired pick here with a 4,700 watt setting to meet it, because the listing gives a 240 volt element rated 4,700 or 7,500 watts rather than a single output. Run it low to hold a garage you heated yesterday, high to recover one you did not. The listing adds a remote thermostat covering 50 to 85 degrees, five adjustable louvers, a timer and a UL and cUL listing; Dr. Infrared adds a 26 lb unit, a bracket for a wall or a ceiling, and a one year limited component warranty. Where it loses: it is hardwired, the cord is not included, nobody has hands-on tested it, and it costs more than a heater with the same top output. What buys back part of that difference is below.

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2. Comfort Zone CZ230ERBK: the best value in a hardwired 240 volt heater

The Comfort Zone CZ230ERBK (ASIN B09H3KWR1B) makes the same top output for less, and it is the one pick here a tester named its best overall: Bob Vila's hands-on Best Overall is this heater, bought under a second listing that ships in 6 to 10 days. Comfort Zone rates it at 7,500 watts and 25,600 BTU, hardwired on 240 volt, with a digital thermostat, a 12 hour timer and a full function remote under a one year warranty. The listing claims coverage up to 1,250 sq ft and adds adjustable louvers and an overheat cutoff. It costs the least up front per 1,000 BTU of any hardwired pick. Comfort Zone sells it as a hardwired ceiling mount, though Bob Vila reports it mounts on a ceiling or a wall and can take a plug-in cord for a 30 amp outlet instead. Where it loses: 7,500 watts is all it makes, which is two thirds more than a two car garage asks for, and Bob Vila's tester found it arrives without the 240 volt pigtail and the cable clamp that secures the wire to the box, so part of that saving goes back out at the hardware counter.

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3. Dr. Infrared Heater DR-988: the most heat you can get without an electrician

The Dr. Infrared Heater DR-988 (ASIN B003XOZN7A) is the one heater here filed by how it heats when what makes it a buy is how it plugs in. One roundup names it, Bob Vila, as its tested Best Infrared. It is 5,600 watts of 240 volt heat on a six foot cord with a NEMA 6-30P plug, wanting a dedicated NEMA 6-30R 250 volt 30 amp outlet rather than a hardwired connection. If your garage already has a 240 volt receptacle for a welder or a compressor, this is real heat with no wiring job attached. Listing and manufacturer both give a thermostat from 37 to 113 degrees, fan ON and AUTO modes, floor or wall use, overheat cutoff and a UL and C-UL listing. Where it loses: that outlet is not optional and no adapter comes in the box. Bob Vila's tester did not have the receptacle either, and says to budget for the outlet and an electrician if you are in the same position.

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4. Heat Storm HS-1500-PHX-WIFI: the best 120 volt garage heater

The Heat Storm HS-1500-PHX-WIFI (ASIN B07JXRWJ8D) is for the garage with no spare circuit and no appetite for adding one, and it is Family Handyman's Best Smart Garage Heater under this exact ASIN. It is a wall mounted 110 volt unit, 1,500 watts and a listed 5,200 BTU, with Wi-Fi control from a phone, a touch screen thermostat, a tip over shutoff and a grill the listing says is safe to touch. Heat Storm splits its coverage honestly: up to 150 sq ft as a primary heat source in a well insulated room, up to 750 sq ft as a supplemental one. Where it loses: 1,500 watts is the ceiling on any standard outlet, so this is among the most expensive heat here per 1,000 BTU, the listing says feet are not included, and nobody has run it hands on.

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5. Briza Infrared Electric Patio Heater: the best pick for heating you, not the room

The Briza Infrared Electric Patio Heater (ASIN B07WCQZG5T) is the most widely recommended model here: Popular Mechanics and Car and Driver both make it their infrared pick and Bob Vila files it as best indoor-outdoor, and two of those three ran it. It is carbon infrared, which the listing describes as heat absorbed by the surfaces around the heater rather than by the air. That is the right trade in a garage with an open door, where heated air leaves and a heated workbench does not. It ships with mounting hardware and a tripod, runs at 900, 1,200 or 1,500 watts, carries an IP55 rating and shuts off if tipped, and Bob Vila's testers found it incredibly quiet, where they called the Flame King loud. Where it loses: it is the priciest heat of any pick here per 1,000 BTU, step out of the beam and you are cold, and Bob Vila's one complaint is the one that matters if you plan to leave it running, which is that it has no thermostat to shut itself off at temperature.

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6. Flame King 60,000 BTU forced air propane heater: the best propane garage heater

The Flame King 60,000 BTU forced air propane heater (ASIN B09FRW24BG) is the torpedo, and it buys heat more cheaply than anything else on this page, picks and runners up together. Flame King states it is for open, well ventilated spaces such as patios and garages up to 1,500 sq ft where there is adequate airflow, and that is the condition we recommend it under. The listing gives a fuel shutoff, a fire detection system, a tilt shutoff, piezo ignition, a hose with a regulator and CSA certification. Bob Vila tested it and had the garage comfortable in about 25 minutes. Where it loses: it needs a 120 volt wall plug as well as a tank, so it is not the cordless machine people assume, and Bob Vila's testers found it loud, like every forced air propane heater in their group. Car and Driver's pick for large garages is a DeWalt rated 68,000 BTU per hour.

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7. Mr. Heater Big Maxx 80,000 BTU unit heater: the best pick if you can run a gas line

The Mr. Heater Big Maxx 80,000 BTU unit heater (ASIN B00KRFVJ4Y) is the step up to a permanent installation, and the only pick here that runs on propane or natural gas. On natural gas it burns the cheapest fuel on this page, which the natural gas section below prices. The listing rates it at 80,000 BTU heating up to 2,667 sq ft, ceiling mounted, compatible with a standard 24 volt thermostat, with a high temperature shutoff switch and a gas shutoff flame sensor. The thermostat is the point: it holds a shop at temperature all winter rather than being switched on when you walk in. Where it loses: the listing requires a 10 ft minimum ceiling height with 8 ft of clearance to the floor, which rules out many attached garages, and Popular Mechanics flags a lengthy installation and says the thermostat, hose and regulator are sold separately.

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Also considered: models that missed the list and why

Seven more heaters a shopper will run into. Every one is a headline pick on somebody's list, and four of them were hands-on tested by a reviewer we link. Each lost to something specific, and the arithmetic for all fourteen models is in the cost table below.

Heat Storm HS-6000-GC, no purchasable listing. The one model both Family Handyman and Popular Mechanics put near the top, and both describe the same machine: 6,000 watts on 240 volt, hardwired, rated 20,000 BTU and up to 1,000 sq ft, controlled over Wi-Fi. It missed for one reason. Amazon returned no buyable record for it on 2026-09-19, so we can neither quote a price nor promise you can get one, and we are not sending you to a listing we could not verify.

NewAir 5,600 watt portable. Three roundups name NewAir, and this listing gives 5,600 watts of 240 volt fan forced heat with an adjustable thermostat, a cool touch exterior and ETL certification, on a plug rather than a hardwired connection. Up front, per 1,000 BTU per hour, it is the cheapest electric heat on this page, undercutting our own value pick. It missed on stock alone: availability read "Only 1 left in stock" when we checked.

Dr. Infrared Heater DR-966. Bob Vila's tested Best Commercial-Grade, and a 240 volt hardwired unit with two settings like our top pick, at 3,000 or 6,000 watts. It lands between our two hardwired picks on price and loses to the Comfort Zone, which gives more top output for less. It is not a pick because this page is built around the two car garage, and neither of its settings lands near the 4,500 watts that room asks for, where the DR-975's 4,700 does, at a higher price. Buy it instead of our picks if your garage is a single bay: its 3,000 watt setting is the closest fit on this page to what a 12 by 20 wants, and it costs less per 1,000 BTU than our best overall.

DeWalt 68,000 BTU forced air propane. Car and Driver's pick for large garages, rated 68,000 BTU per hour on its listing, and genuinely cordless: Car and Driver ran it on a standard 120 volt socket or a 20 volt battery. It missed on evidence rather than merit: the listing carries one feature bullet and no model number, so almost nothing about it can be traced, and DeWalt's own page for the model Car and Driver names in its text is headed 70,000 BTU instead.

Mr. Heater Big Buddy PRO. Car and Driver's overall winner, and the only model here that runs on nothing but propane, no cord and no battery, which is the one to want where there is no power at all rather than no spare circuit; for that job our best portable power stations guide is the other half of the answer. It is radiant, 4,000, 9,000 or 18,000 BTU, listed for up to 450 sq ft and with a fan in its spec list, though Car and Driver found the heat rising off the unit rather than circulating. It missed on the cost of that heat: the Flame King makes more than three times the output for less, so each unit of its heat costs far less up front. Buy the Big Buddy if having no cord is worth that.

Modine Hot Dawg HD45. Family Handyman's pick for a two car garage, and the brand most people mean by garage heater. The listing gives 45,000 BTU, quiet operation, certification for residential, commercial and industrial use, a low profile cabinet, and a standard power exhaust that vents out a side wall or roof on small diameter pipe. It burns the same cheap fuel as the Big Maxx, about $1.05 an hour for its 45,000 BTU. It missed on price: it costs far more than our best overall, before the gas fitter arrives.

Fahrenheat FUH5-4. Bob Vila's tested Best for Ceilings, a 5,000 watt ceiling mount its tester reports runs on 240 volt with a built in thermostat and a thermal safety shutoff, and has to be direct wired. It missed on up front cost: per 1,000 BTU per hour it is the most expensive heat of any model here.

What a garage heater actually costs to run

Watts convert at 3.412 BTU per watt, so 7,500 watts is 25,590 BTU per hour. Price divided by output is what a heater charges up front for its heat. Power draw times your rate is what it charges every hour after that.

Assumptions, so you can swap in your own: electricity at 18.34 cents per kilowatt hour, the US residential average for June 2026 in the EIA Electric Power Monthly; propane at $2.674 a gallon, the US residential price for the week of 2026-03-30 in the EIA weekly series; natural gas at $24.09 per thousand cubic feet, the US residential price for June 2026 in the EIA monthly series; and heat content from EIA at 91,452 BTU per gallon of propane, 1,036 BTU per cubic foot of natural gas and 3,412 BTU per kilowatt hour.

The fuel decides the hourly cost, not the model. At those rates, natural gas delivers heat at about 2.3 cents per 1,000 BTU, propane at about 2.9 cents, and electric resistance at about 5.4 cents. Electric costs roughly 1.8 times what propane does per unit of heat and about 2.3 times what natural gas does, and that ratio is the same for every machine in the table. What changes model to model is how much heat you get per hour and what you paid up front for it.

Three things fall out of the fourteen rows. The hourly column is a size column, not a fuel column: the Flame King costs more per hour than the Comfort Zone because it is putting out 2.3 times the heat, and the two 1,500 watt picks are cheapest per hour because they make the least. The DR-975 and the Comfort Zone make identical rated heat and the DR-975 costs more, so it has to earn that somewhere other than output. And the up front cost of output and the hourly cost of running it rank these heaters in nearly opposite orders.

One note on the propane rows. Flame King states up to 8 hours from a 20 lb bottle, and Bob Vila's testers got it, against 7 hours for most of the field. At EIA's heat content, 8 hours at the full 60,000 BTU would be about 5.25 gallons, so the hourly figures here are a ceiling rather than what a thermostat will actually cost you.

What size heater do you need for a two car garage?

About 4,500 watts, or roughly 15,400 BTU per hour, for a 20 by 20 garage with a 9 ft ceiling. Every roundup sizes garages by floor area, and floor area does not hold heat. Air does, and Dr. Infrared's DR-975 manual is the only place any of these makers publishes a volume figure: it rates that heater at 1.25 watts per cubic foot. That is a capacity rating rather than an industry rule, so we are extending one manufacturer's own number, at a stated 9 ft ceiling, with watts converted at 3.412 BTU per watt.

The honest reading of the top row is that this page has no good answer for a one car garage on a 240 volt circuit. The DR-966 we left in the second tier is the closest fit here, and if you buy our DR-988 anyway, run it on its thermostat and expect it to cycle. Further down the table it lands better: the DR-975 on its 4,700 watt setting is 4 percent over the two car number, where the Comfort Zone's single 7,500 is two thirds over.

Car and Driver, which tested, publishes a rule of thumb worth checking ours against: 10 watts per square foot for electric heaters, or 45 BTU per square foot for gas. On a 20 by 20 that is 4,000 watts against our 4,500, so two independent methods land within about 12 percent of each other, and ours also asks how tall your ceiling is. What neither rule knows is the rest of it. Car and Driver names the variables plainly: the size of the garage, the insulation quality and the temperature rise you want. A 9 ft ceiling and a number are where sizing starts, not where it finishes.

Sizing up is not free either. Garage Gym Reviews puts the case against oversizing directly: an oversized unit takes longer to reach the set point and cycles on and off more than one sized properly or even a little under, which wastes energy. That is the argument for a heater with two output levels in a space this size, and it is why the two car row above points at a 4,700 watt setting rather than at the biggest number on the page.

If your constraint is the outlet rather than the garage, run the arithmetic rather than taking a reassurance. A 1,500 watt plug in heater makes 5,118 BTU per hour against the 9,212 a one car garage asks for, so it is a bit over half of what the room wants. That is why the honest job for one is a workbench, or holding an insulated bay above freezing, and not heating the garage.

Here is the part no roundup prints. The coverage figures manufacturers publish for their own heaters do not agree, and the gap is close to twofold.

Comfort Zone says 7,500 watts covers 1,250 sq ft. Dr. Infrared's figure says the same watts cover 6,000 cubic feet, about 667 sq ft at 9 ft. Neither is lying; they answer different questions, one about taking the edge off and one about holding a temperature. When a spec sheet quotes square feet with no ceiling height, do the volume yourself.

What is the best electric garage heater?

The best electric garage heater for most people is the Dr. Infrared Heater DR-975, because its 4,700 watt setting is the one output on this page that matches what a two car garage actually asks for. If budget is the constraint, the Comfort Zone CZ230ERBK makes the same top output for less, in a single setting.

Electric wins on what spec sheets undersell: no fuel to store, no combustion and so no ventilation question, and a thermostat that has the garage warm before you open the door. It loses on the cost of the heat itself, where the fuel table above puts electric resistance at roughly double propane and more than double natural gas, whatever machine you buy.

Will a 120 volt garage heater actually heat a garage?

Not a whole one. A standard 120 volt outlet tops out at 1,500 watts for a heater, which is 5,118 BTU per hour, and the sizing table above says a two car garage wants about three times that. What it does well is warm a corner, or hold an insulated single bay above freezing.

Heat Storm is candid in its own listing: up to 150 sq ft as a primary heat source, up to 750 sq ft as a supplemental one. Those are different claims about the same 1,500 watts, and the difference is whether the heater is the heat or is helping. Bob Vila's budget pick is a 1,500 watt Lasko tower, and its tester reported the same from the other side: it did not heat the whole garage, but it made a real difference right around it. Their one complaint is worth repeating if children or a dog use the garage. It has no tip-over protection: they left it face down on the floor for over a minute and it just kept heating.

What is the best propane garage heater?

The best propane garage heater for a working garage is the Flame King 60,000 BTU forced air unit, on the condition its own maker sets: open, well ventilated space with adequate airflow. In practice that means the door up, which is when you most want it, because an open door is what made the garage cold.

Against electric resistance heat, propane is both the cheaper fuel and the cheaper machine: the torpedo costs less up front per 1,000 BTU of rated output than any electric pick, on top of the fuel gap above. Natural gas is cheaper than either. The hourly figure in the table is higher only because the torpedo is a much bigger machine. What propane costs you instead is the ventilation condition, and water. Family Handyman's verdict on the forced air fuel burner it picked, a kerosene unit, is that it is noisy, requires significant ventilation and creates moisture that will condense on your tools, and then that with an open overhead door, all the negatives drop away. That is the same condition Flame King sets.

Should you get a natural gas garage heater?

Get a gas unit heater if you have a gas line at the garage, the ceiling height for it and a winter long reason to hold the space at temperature. The Mr. Heater Big Maxx is the model both Popular Mechanics and Garage Gym Reviews land on, and it runs on propane or natural gas, rated 80,000 BTU and up to 2,667 sq ft.

Natural gas is the cheapest fuel on this page, and less than half what electric resistance costs per unit of heat: $1.86 an hour for all 80,000 BTU, against $1.38 an hour for under a third of that output from a hardwired electric heater. One caveat on that price, in our own disfavour: the EIA figure we used is June, when the fixed monthly charge is spread over almost no usage. The same table has January at $13.96 per thousand cubic feet, which would put gas nearer 1.3 cents per 1,000 BTU and widen the gap. Read the clearances before you fall for it, though. The listing requires a 10 ft minimum ceiling height and 8 ft from the base of the heater to the floor, which many attached garages do not have, and adding a gas fitter, the flue work local code requires and a thermostat turns the heater into a far bigger project than its sticker suggests.

Are infrared garage heaters worth it?

Infrared is worth it when the air will not stay put. A fan forced heater warms the air, and air leaves through an open door or an uninsulated wall. Infrared warms the surfaces it reaches, so the bench, the floor and you stay warm while the air does whatever it wants.

That is why the Briza is the most recommended heater here, and the wrong pick for a sealed insulated garage you want uniformly warm, where fan forced heat costs far less per BTU. The DR-988 hedges, describing an infrared element and forced air in one cabinet.

Do you need an electrician for a garage heater?

For any hardwired 240 volt heater, yes. Both hardwired picks connect to the building's wiring rather than to a plug, and that is licensed work in most places. The DR-975's manual specifies 8 AWG copper supply cables and says the heater must be connected to an individual branch circuit protected by a 40 amp circuit breaker only, and Comfort Zone says its unit is designed for hardwired installation on 240 volt. Those are the manufacturers' figures, for your electrician to size and confirm against local code.

You can skip the electrician twice over. The Heat Storm plugs into an ordinary outlet, and the DR-988 into a 240 volt NEMA 6-30R outlet, so if one already exists you are done. The manual's own words are the reason not to share a circuit with a compressor or a table saw: an individual branch circuit is what these heaters ask for.

How do you choose a garage heater?

Start from the power you already have, not the heater you want. The supply decides the category, the category decides the output you can reach, and only then does the model matter.

• Measure the volume, not the floor, if you want the whole bay warm. Length by width by ceiling height, then 1.25 watts per cubic foot. Spot heating a bench is a different purchase and a much smaller number.
• Price the fuel, then the machine. The fuel sets your hourly cost before the model does. Everything after that is output and what you paid up front for it.
• Read the clearances first. The Big Maxx wants a 10 ft ceiling. The Heat Storm ships without feet.

What a heated garage does for your tools

A warm garage changes what you can keep out there, because steel that swings between freezing and thawing collects the condensation that turns a good edge orange, which is the argument for electric heat over an unvented fuel burner indoors. Our guide to off season tool care and storage covers the routine, the best firewood racks cover the other thing a garage fills with in winter, and if the cold work is outdoors rather than in, our best patio heaters guide warms a space with no walls. When the ground thaws the first job is digging: Spear Head Spade makes one double patented digging spade, and the spade finder says which size fits your soil.

Frequently asked questions

How many BTU do you need to heat a two car garage?

About 15,400 BTU per hour for a 20 by 20 garage with a 9 ft ceiling. That comes from Dr. Infrared's own manual figure of 1.25 watts per cubic foot: 3,600 cubic feet is 4,500 watts, converted at 3.412 BTU per watt. Car and Driver's tested rule of thumb, 10 watts per square foot, gives 4,000 watts for the same garage.

Are propane heaters safe in a garage?

Only under the conditions the maker sets. Flame King states its forced air heater is for open, well ventilated spaces such as patios and garages up to 1,500 sq ft where there is adequate airflow. That is the only condition we assert. Garage Gym Reviews leaves propane heaters off its garage list altogether, on the grounds that an unventilated propane heater can produce carbon monoxide. Follow the manual and local code.

What is the cheapest way to heat a garage?

By fuel, natural gas at about 2.3 cents per 1,000 BTU, then propane at 2.9, then electric resistance at 5.4, at the EIA prices this page uses. By up front cost of output, forced air propane. If the garage is uninsulated, insulation beats all of them, because until it is done every heater here is paying to warm the outdoors.

How much does it cost to run a 1,500 watt heater for 8 hours?

About $2.20 at 18.34 cents per kilowatt hour, the US residential average for June 2026. The arithmetic is 1.5 kilowatts times 8 hours times the rate, at full output throughout, which a thermostat will not do. It is also the least heat on this page, not the cheapest heat.

Can you leave a garage heater running unattended?

Treat that as a question for the manual, not for us. What the listings state: the Heat Storm has a tip over shutoff, the Comfort Zone and the DR-988 cut off on overheat, and the Big Maxx has a high temperature shutoff and a gas shutoff flame sensor. The Briza shuts off if tipped and has a timer, but Bob Vila's testers note it has no thermostat, so it cannot hold a temperature on its own.

The bottom line

Buy the Dr. Infrared Heater DR-975 if you have 240 volt service and want a two car garage genuinely warm at the size it actually asks for, the Comfort Zone CZ230ERBK if you want that top output for less and can live with one setting, and the Dr. Infrared Heater DR-988 if a 240 volt outlet is already out there. Work with the door open and the Flame King torpedo buys its output for less up front than anything else here, and propane is the fuel you can wheel in. Natural gas is cheaper still if you already have a line to the garage. Size it by the volume of the garage, not the square feet on the box.