Best Heater for Uninsulated Garage

Disclaimer: All claims are strictly my personal opinion. As an Amazon Associate, I may earn from qualifying purchases.

An uninsulated garage requires more heat to totally warm the garage. The smaller garage will need less heat while the bigger one will require more heat to reach up to comfortable warmth level in the garage.

Different kinds of heaters are available in the market in the market. The most common types include; electric space heaters, propane heater, infrared heater, and oil filled heaters.

Winter is really hazardous for the garage. The temperature of the garage drops to such an extent that it makes working uncomfortable. The temperature further drops down in the case of an uninsulated garage. The atmosphere in the garage gets chilly and it causes shivering.

An appropriate heater is the best solution to cope with a cold uninsulated garage.

The infrared heaters make less noise while the propane heaters are noisier.

The electric heaters consume too much energy and the oil filled heaters are conventional types.

You need a heater which can maintain a comfortable working temperature in an uninsulated garage.

I have analyzed & reviewed garage heaters to come up with a list of best suited heaters for uninsulated garages.


Here are my recommended products picked out through amazon; you would be interested in depending on your budget…

Best Value
Mr. Heater F260550 Big Maxx MHU50NG Natural Gas Unit...
Mr. Heater F260550 Big Maxx MHU50NG Natural Gas Unit...
50,000 BTU per hour heats up to 1250 sq. ft.; Powered exhaust allows for vertical or horizontal venting

8 Best Heater for Uninsulated Garage Reviews

The quick links to our chosen list of heaters are given below.

1. Mr. Heater Big Maxx Natural Gas Heater

See at Amazon!

Salient Features
  • Heat Capacity 50,000 BTU/Hour
  • Covers 1250 Sq. feet
  • Natural gas to liquid propane conversion kit
  • Fitted with self-investigative module
  • Vertical and horizontal discharging
  • Provided with ½ inch gas connection


This big Maxx heater has the capacity to warm an area of 1250 square feet. It is run on natural gas. It quickly heats up the space. It makes less noise during the operation.

It can be very choice for the garage that is not insulated. This heater is suitable for a garage having a capacity for 3 cars.

The heater delivers heat up to 50,000 BTU/hour. This heater is fitted with natural gas to the liquid propane conversion kit.  This heater discharges heat both vertically and horizontally.

It is equipped with 3 horizontal heat discharges and 1 vertical discharge. The heater is provided with a self-diagnostic module that automatically detects and adjusts the heat level in the garage.

The heater does not include a thermostat; it can be purchased separately to connect with the heater. The remote control is also not provided.

The heater has a ½ inch gas connection. The heater is provided with brackets for installation. It can be installed on the floor surface or with the ceiling.

A clearance of 8 feet is required for its proper installation. The direction of piping can be rotated to right or left to change the gas connection as per convenience.

Its ignition system is electric and it is provided with oxygen depletion sensors.

What We Like!
  • Warms larger area
  • Delivers high heat capacity
  • Allows vertical & horizontal heat discharge
  • Ceiling and surface installation option
  • Quiet operation
  • Uniformly distributes heat
Things to Consider!
  • No oxygen depletion sensor
  • Tends to catch fire

2. Dimplex Portable Construction Heater

See at Amazon!

Salient Features
  • Stainless steel tubular heating element
  • High heat protection for safety
  • Propeller type fan
  • Heavy duty 240 volt built
  • Air flow capacity of 300 CFM
  • Indicate light for overheating & operation


This heater is made of heavy duty material. This heater is best suited for garages having no insulation. It can also be used for construction sites for temporary purposes.

The heater weighs only 9.7 pounds and can be mobilized around easily. The heater delivers high efficiency and performance. This heater operates on 240 volts.

This heater comes with a stainless steel tubular heating element. The heating element of the heater is highly durable lasts for longer period.

The heater mechanism of this heater is forced air. It effectively pushes the air throughout the garage. The heater can conveniently supply an air flow of 300 CFM.

The heater is equipped with a propeller type fan. This fan is well balanced and aligned to deliver high performance.

The heater is fitted with the indicting lights. The light turns on when the heater is running. Light also blinks in case of over-heating.

The heater is equipped with the over-heating protection which automatically cuts off when the heat exceeds the upper limit.

This provides safe operation of the heater. The heater includes a 6 feet cable for easily plugging of the heater.

This wire can be rolled inside the heater making the storage of cable easier and quick.

What We Like!
  • Delivers high performance
  • Durable heating element
  • Equally forces the air throughout the space
  • Lightweight & portable
  • Over-heating safety
  • Indicating lights
Things to Consider!
  • Fan can be noisy sometimes
  • Keep inflammable material away to avoid fire hazard

3. TPI Corporation Fan Forced Heater

See at Amazon!

Salient Features
  • Coverage area 200-400 sq. ft.
  • Maximum BTU 13,652
  • Includes rotational bracket for multiple mounting
  • Over-heating protection
  • Equipped with Forced air fan
  • Tubular steel heating element
  • Thermostat to adjust temperature b/w 35 to 85 oF
  • Throws air at 262 CF per minute


This heater by TPI corporation operates at 240/208V and consumes 4kw of power. This heater is fitted with swivel brackets that allow you to install it in any configuration style.

It is a very good option for heating uninsulated garages, workshops, and construction sites. This heater has the capacity to deliver heat up to 13560 BTU.

This heater is equipped with a forced air fan. This fan is evenly distributed in the garage. This fan forced heater can conveniently cover an area up to 200-400 square feet.

The fan is fitted with steel made tubular heating elements. This heating element offers good durability without damage. The quickly warms the garage space and can provide a temperature rise up to 48 F.

The heater also has an adjustable thermostat which can be regulated between 35 to 85 F temperatures.

The heater includes indicating lights that blink during the operation and over-heating. The heater is also provided an over-heating safety relay that trips the heater if over-heating is observed.

A handle mounted at the top of the heater allows easy mobility of the heater. A feet cable with a molded plug is attached to the heater to quickly start the heater.

What We Like!
  • Evenly distributes heat
  • Allows multiple mounting configurations
  • Trips in case of over-heating
  • Easy to move around
  • Blinks light for over heating
  • Thermostat allows temperature
  • Quickly warms the area
Things to Consider!
  • Good for small garages

4. Mr. Heater Corporation Convection Heater

See at Amazon!

Salient Features
  • Deliver heat up to 75,000 to 200,000 BTU/Hour
  • Heats up an area of 5000 Sq. Ft.
  • Propane filled convection heater
  • Has a run time at max BTU 2.16 hours
  • Provided POL tank and hose pipe
  • Standing pilot provides safety
  • Includes thermoelectric safety valve


This is one of the best propane heaters. It is a very good option for an uninsulated garage. This heater has the capacity to deliver heat between 75,000 to 200,000 BTU of heat.

It can warm an area up to 5000 square feet. The warmth quickly spread in the garage in a natural way. The heater comes with an instant locking assembly and can be easily installed.

This heater is provided with a liquid propane tank. The hose is also provided with 10 feet hose pipe to easily connect the gas supply to the heater. The heater uses the convection method to warm the space.

This heater runs up to 29 hours on 100 pound propane at minimum BTU while its run time decreases to 2.16 hours at maximum capacity.

The heater comes in the pilot standing assembly that provides maximum safety. The heater is also equipped with thermo electric valve that shuts off if the flame goes out of the heater.

The heater comes with a piezo ignition push button to easily ignite the heater. The heater does not release any odor or smell during the operation.

Any flammable material kept around the heater must be removed to avoid a potential fire hazard. This heater is also approved by CSA certifications.

What We Like!
  • Quickly warms the whole garage
  • Delivers high heat capacity
  • Heats up a larger area
  • Trips in case of flame coming out of the heater
  • Easy to operate
  • Release no odor or smell
  • Runs for a longer time
Things to Consider!
  • Use 100 pound tank instead of 20 pounds to run it for a long time
  • At maximum heat capacity, the outer surface of the heater may become warmer

5. Dero 24” Electric Space Heater

See at Amazon!

Salient Features
  • 24 inches tall heat up at a rate of 10 ft/second
  • 70o degree oscillation
  • 1500 Watt ceramic heating element
  • Fan with 2500 RPM
  • Auto shut off after 24 hours
  • 40 dB noise level
  • VO flame resistant material
  • Over-heat protection
  • Thermostat to regulate the temperature between 41 to 95 F
  • Remote control
  • Tip over protection


his Dero 24 inch tall heater is really helpful to overcome the cold conditions in the garage. This is a sophisticated heater that uses ceramic made heating element.

This 2S heating element quickly warms each and every corner of the garage. It is also very effective for uninsulated garage space.

The heater is equipped with 70 degree oscillation that enables the heater to distribute the heat throughout the garage. The heater can be easily moved around with a built-in handle.

This heater is made of VO flame resistant material. It heats up the space at a rate of 10 feet per second. This heater is equipped with multiple safety features.

It trips on observing over-heating. It is also protected against tips or accidents. This heater features auto shut off after 24 hours without touching the heater. The heater also includes anti-bending prongs.

The heater is fully automatic and allows you to control the temperature from your cabin or office.

The thermostat equipped with the heater allows regulation between three modes i.e 1500 watts, 900 watts, and economy mode. The heater can be regulated between 41 to 95oF with this thermostat.

What We Like!
  • Quickly warming heating element
  • Allows to switch between different heat modes
  • Can be adjusted with a thermostat
  • Remotely controlled
  • Over-heating and tip over protection
  • Auto shut off
  • Low noise
Things to Consider!
  • Avoid storing in a wet place
  • Use wall socket instead loose wire

6. Fahrenheat FUH Electric Heater for Garage

See at Amazon!

Salient Features
  • A thermostat allows temperature between 45 to 135 oF
  • Wattage 5000
  • Adjustable louvers allow directing heat at the targeted place
  • Over-heating automatically shuts off the heater
  • Included bracket for mounting it on the ceiling or wall
  • Suitable for large garage spaces
  • Includes fan


This Fahrenheat heater is a heavy duty electric heater. It heats up the garage space and provides comfort. This heater includes a bracket to install with the ceiling or wall.

The mounting cushion allows directional control of heat; you can set the heat direction towards a desired space in the garage. This heater delivers heat in the tight corners as well. The heater can be operated on both 208 and 240V.

The power consumption by this heater can be changed between 2500 and 5000 watts. At 5000 watts the heater provides warmth to more area in comparison to the 2500 watts.

The heater is also fitted with an adjustable thermostat that allows you to regulate the temperature between 45 to 135 oF. This gives you total heat control.

The heater includes an overheating protection. This protection operates when the temperature exceeds a higher limit. The heater is also provided with the fan, this fan operates when the heating element trips at a higher temperature.

The heater does not allow the circulation of cool air inside the garage and thus maintains the warmth in the garage for a long time.

The heater provides effective and long lasting warmth in the insulated garage.

What We Like!
  • Warms the space for a longer period
  • Allows total heat control
  • Temperature can be adjusted
  • Heat mode can be switched between high & low
  • Safety for over-heating
  • Directional control of heat
Things to Consider!
  • Some customers say over-heating some does not work properly

7. Brightown Electric Space Heater for Uninsulated Garage

See at Amazon!

Salient Features
  • Equipped with PTC ceramic element
  • Switched between 750 & 1500 heating mode
  • Covers an area of 200 Sq. Feet
  • A thermostat allows temperature control between 0-158 oF
  • Over-heating and tip protection
  • Made of flame resistant material
  • Low noise operation up to 50 dB
  • Includes fan to throw cool air during summer


This heater comes in beautiful black color and its exterior is also very attractive. Although this heater is smaller in shape but warms the space efficiently.

It is suitable for a small space garage. This heater is lightweight and can be placed at any convenient place in the garage. Avoid placing the heater in the corner of the garage.

The heater is fitted with a PTC ceramic heating element. This heating element performs very well and heats up the space quickly. The heater allows you to switch between 750 & 1500 watts heating mode.

The thermostat further provides temperature control between 0-158 oF. The heater can effectively warm an area up to 200 square feet.

The heater is provided with multiple safety protections. Over-heating turns off the heater at higher temperatures. The fan automatically starts when the heater trips due to over-heating.

The heater material also resists the flame. Anti-accident protection saves the heater from breaking in case of falls down. The operation of this heater is quite low, its noise level is 50dB.

The heater includes handling to move the heater around. This heater is also listed with ETL for safe operations.

What We Like!
  • Effectively warms the space
  • The heating mode can be changed
  • Temperature can be controlled
  • Runs quietly
  • Prevents breaking in case of an accident
  • Turns off at a higher heat level
  • Not affected by flame
Things to Consider!
  • Lightweight, can fall easily

8. Trustech Portable Electric Heater for Uninsulated Garage

See at Amazon!

Salient Features
  • PTC ceramic heating element
  • Heats the space between 750 & 1500 watts
  • Over-heating safety protection
  • Tip protection
  • Adjustable angle of 45 degree
  • Fan blows cool air during the summer


This heater by the trust is ideal for smaller garages. It can be placed on the table or any higher place. The heater direction can be adjusted at 45 degree angle.

This portable heater has the capacity to wide spread the warmth in the garage and keep the space comfortable for vehicles during the chilly winter days.

It comes with a PTC ceramic heating element. This heating element is backed by a fan that evenly throws the hot air in the garage and quickly heats up the space.

This is really good for an uninsulated garage. This heater runs quietly and doesn’t disturb anybody while working or sleeping.

The over-heating tripping safety protection is provided with the heater. It shuts the heater off and the fan keeps on running.

The fan lowers the heating to a comfortable and once the heating is low, the heating elements start running again. The fan can also be used for summer use as it circulates cool air.

What We Like!
  • High performing heating element
  • Distributes heat evenly
  • Can be changed between low and high heat
  • Super quiet operation
  • Tip protection saves from accident
  • Turns off at over heating
  • Portable and can be placed anywhere
Things to Consider!
  • Very lightweight

Buying Guide

The market is flooded with various kinds of heaters for garages. Choosing the right heater for an uninsulated garage space is a bit tricky. A high warming heater will be required for such space. The following factor will help you to pick the right heater for your needs.


The size of the heater is selected based on the area of the garage. If the garage is larger, a larger heater will be required to heat up the garage.

The uninsulated garage will need a bigger heater of the same size as the insulated garage. A heater with a coverage area as high as 500o square feet are available in the market.

The heaters with smaller coverage are also found in the market. The natural gas run heaters are normally cover larger space.

You must know the exact size of your garage and then multiply it with 1.25 to choose the right sized heater for your garage that has no insulation.

Heating Module

The heaters have different heating modules. The most common types of garage heaters are electric heaters, natural gas heaters, propane heaters, oil heaters, and coal run heaters.

The electric and gas heaters are frequently used in the garage. The electric heaters are easier to run and operate. These are provided with the power cable that is connected to the electric socket to start the heater.

These types of heaters quickly warm the space and make the atmosphere comfortable. The natural gas heaters are connected to the gas supply through a nipple and hose pipe.

The propane run heaters require the fuel tank to operate. The liquid fuel tanks with varying capacities are connected with the heater to run.

Small fuel tanks last for a shorter period while larger fuel tanks run the heater a fairly long time. You can choose an appropriate heater type keeping in mind your garage needs.

Power Ratings (BTU)

The power rating of the heater is the most important factor that actually dictates the selection of a suitable heater for your garage space. The more the power rating the higher will be the warmth in the garage.

The uninsulated garages require more heaters with more power ratings to fully warm the space. The heater having a power rating in the range of 200,000 BTU is available in the market to heat up a big uninstalled garage.

The smaller power rating heater will be useful for the smaller garage space. The power rating of each heater is mentioned on the product.

You must read the power rating of the heater before finalizing a suitable for your garage space.

Heating Element

The heating element of the heater is another key factor that determines the right choice of the heater. The stainless steel heating elements are the most robust and durable.

These heating elements come in a pipe and are mostly employed in the gas run heaters. The stainless steel heating lasts for a long time and these elements don’t damage.

The PTC ceramic heating element is another high strength element that delivers quality. These elements are used in the electric heaters and these are ideal to quickly heat up the space.


A built-in or a separate thermostat is provided with the heater. The thermostat allows changing the heating mode between low and high. Some thermostats have three heating settings to choose from, high medium, and economical.

The thermostat also helps to control the temperature to better suit your body and environment. The temperature range of each thermostat is different.

Some heaters are not equipped with thermostats; a separate thermostat can be used for this kind of heater.

Safety Protections

A garage heater can be a potential fire hazard. Safe running of the heater is of utmost necessity. The heaters have many safety features.

The most common safety is over-heating protection. The heater automatically trips when it exceeds the higher heating limit. The tip over protection is provided for most of the heaters to prevent damage due to falling accidents.

Cool touch safety protection is also featured in some of the sophisticated heaters. These kinds of heaters are made of flame resistant material and these materials don’t get heated during the running of the heater.

You can comfortably touch the heater without fear of burning hands. The gas heater employs a safe standing installation to avoid accidents. Safety features are a must before choosing a garage heater.

Quiet Operation

Quiet running of the heater is also checked. A noisy heater will make it difficult for the technicians to talk with each other while working on the vehicles.

This will also disturb the atmosphere of the garage. The gas run heaters make more noise in comparison to the electric heater. The infrared heaters are super quiet heaters.

Ease of Use

Ease of use of running a heater is also a key. Some heaters come with a remote control that allows you to control the heater from a safe place.

You can even change the temperature while sitting in your cozy office. Heaters with the auto shut off feature automatically turns off after reaching the preset time.

Time can be set at 24 hours, 12 hours, or even 4 hours to save energy. This also allows you to maintain a specific heating level in the garage that is suitable for you.


The heaters are equipped with fans. The fan throws the heat across the length of the garage. The fan is also handy when the heater automatically turns off.

The fan continues to run and cool the element till the point it starts again to warm the space. This cycle continues and the heater turns on and off to maintain a required level of warmth in the garage.

The fan is also useful during the summer to throw cool air in the garage.


The heaters are provided with the mounting bracket to install it with the ceiling or wall. The bracket can be adjusted in such a way that the flow of heat can be directed at a specific place.

Some heaters are portable and are provided with a handle to easily move the heater around.

The Final Word

The heaters are used to warm the garage. The best suited heater for the uninsulated garage maintains a comfortable heat level in the garage during cold weather conditions.

In the above article, we have discussed different types of heaters. The propane run heaters are used to warm a larger uninsulated garage. These heaters can run 29 hours at low capacity at 100 pounds tank. We have also highlighted the electric heater having high strength PTC heating element that has the capacity to last for a long time. These heaters are made of flame resistant material and you can easily touch them while running. The fully automatic electric heaters have also been deliberated here. These heaters are provided with over-heating and tip over protection for the safe running of heater in an uninsulated garage.

All the heaters discussed conveniently warm the uninsulated garage and lasts for a longer period. You can easily choose a better quality heater for your garage needs after reading the above product review and buying guide.

Related Posts:

You may also love to read these my reviews and the buying guides

Frequently Asked Questions (FAQs)

The following frequently asked questions will also help you to better understand the functioning of the heater and choose a good quality heater for your needs.

What is the Best Heater for Uninsulated Garage?

Here is my list of uninsulated garage heaters in 2022;

  1. Mr. Heater Big Maxx Natural Gas Heater
  2. Dimplex Portable Construction Heater
  3. TPI Corporation Fan Forced Heater
  4. Mr. Heater Corporation Convection Heater
  5. Dero 24” Electric Space Heater
  6. Fahrenheat FUH Electric Heater for Garage
  7. Brightown Electric Space Heater for Uninsulated Garage
  8. Trustech Portable Electric Heater for Uninsulated Garage

Can a gas run heater be used in the garage?

Yes, the natural gas or propane run heaters can effectively be used in the garage. The exhaust fumes of the gas heater must be discharged from the garage, otherwise it will pose problem for the breathing and suffocate the environment. The gas run heaters are also provided with the over-heating shut off valve to close the heater if the heater exceeds the upper heat limit.

How much BTUs are required to warm an uninsulated garage?

The smaller garage will require small BTU to warm the garage. One car garage will need approximately 1000 BTU power rating to fully warm the garage. The uninsulated garage will require more heat to warm the space. The bigger the size of the garage the more the BTUs will be required to heat up the garage.

Are the electric heaters a fire hazard?

An electric heater can be a fire hazard if an inflammable material is placed around the heater. The electric heater should be carefully operated to avoid any accident.

Does a heater deplete oxygen level in the garage?

ETL listed heaters are tested before using. These heaters are provided with anti-oxygen depletion devices. These heaters are not harmful to use in the garage. Furthermore the oxygen level in the garage is determined by the ventilation.

What Safety protections are provided with the heater?

The heaters are provided with a number of protections to safely operate the heater the uninsulated garage. Most of the heaters are equipped with the over-heating protection that automatically shuts off the heater if the upper heat limit is crossed. Tip over protection is also provided with the heaters to prevent the heaters from the falling accident. Heaters also feature auto shut off timer.

David Houghton
Latest posts by David Houghton (see all)

Leave a Comment

Your email address will not be published.

Scroll to Top